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Cost
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Item
Description
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Click Picture
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$65.00 |
M600c This is an exceptional
specimen of Tourmaline and Smokey Quartz in matrix from Brazil.
This incredible specimen measures 5 1/2" x 3 3/8" x 3"; weighs
nearly 2 pounds and has not been polished. It has several well
defined Tourmaline imbedded in the matrix. Just nice!
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The Tourmaline mineral group is chemically one of the most
complicated groups of Silicate minerals. Its composition varies widely
with Sodium, Calcium, Iron, Magnesium, Lithium, Aluminum, Boron and other
elements. It has a wide variety of colors including black, blue-black,
brown, yellow, red, green, pink and is rarely colorless. This mineral is
found in igneous rocks, like Granite Pegmatite, and metamorphic rocks such
as Schist and Marble.
Quartz is the second most common mineral in the Earth's continental
crust. It is mainly composed of Silica or Silica based minerals.
Although Quartz is known by a variety of names, the most important distinction
between types of Quartz is that of macro-crystalline, individual crystals
visible to the unaided eye, and micro-crystalline, where aggregates of crystals
are only visible under high magnification. There are many forms of Quartz
including Chalcedony, Amethyst, Citrine, and Carnelian which are results of
mineral impurities or heat treatments.
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Tourmaline - Smokey Quartz
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$30.00 |
M601b Here
is an exceptional specimen of Cobaltocalcite or Sphaerocobaltite with some
Malachite in Matrix
from Zaire in Africa. This unusual and eye catching specimen has a
natural Pink color with some darker spots mixed in all with a cool Botryoidal
texture with lots of character. It measures 3 1/2" x 2 1/2" x
1 5/8" and has a natural sparkly shine. A very nice, unique
specimen.
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Sphaerocobaltite, also known as Cobaltocalcite or Cobaltian-calcite, is
a colorful and beautiful mineral. The deep rose-red to pink color it
has makes is easy to confuse with Rhodochrosite or Stichtite as all have
the similar red to pink colors. Impure specimens can be shades of pink to
pale brown. It is found as crusts and small crystals in many cobalt ore
locations.
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Cobaltocalcite
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$45.00 |
M602b This is something
different for the mineral collector. Here is a nice section of a
Purple Amethyst Geode from Uruguay. The pretty specimen measures
4 1/2" x 3 1/2" x 5" and has a natural super sparkly
appearance. This lovely piece has an excellent array of various
shades of Purple Amethyst Crystals.
Just plain beautiful!
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Click
here to view more Amethyst specimens!
Amethyst is a purple variety of Quartz often used as an ornament.
Upon exposure to heat, Amethyst generally becomes yellow, which some refer
to as Citrine or "burnt" Amethyst. It occurs in color from a light,
slightly pinkish violet to a deep grape purple. It is widely distributed
as a mineral.
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Amethyst
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$45.00 |
M603c
Here is a very nice quality combination specimen of
Wulfenite and Mimetite from Durango, Mexico. This exceptional piece
has some very small Yellow Wulfenite crystals of different sizes and shapes poking
out in all directions from the pretty green Mimetite and rust colored
matrix. No matter from what angle you look at it, it's just plain
gorgeous. This beautiful, rarer combination mineral measures nearly
3 5/8" x almost 3 1/8" x nearly 2 1/8" and has a natural, unpolished appearance with sparkly
iridescence. Very, very cool!
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Wulfenite is a lead molybdate mineral named for an Austrian
mineralogist. It is most often found as stubby, pryamidal or tabular
crystals in a bright orange-red to yellow-orange color. It is found in
many locations, associated with lead ores as a secondary mineral and often
found with Cerussite, Smithsonite, Hemimorphite, Vanadinite, Mimetite and
other minerals. Among the more notable locations for finding Wulfenite are
Pennsylvania, Arizona and Mexico.
Mimetite is an Arsenic mineral often associated with Lead, Galena, Vanadinite,
Wulfenite, Calcite and Arsenopyrite. It resembles Pyromorphite as it
falls in the same series of minerals as Pyromorphite and Vanadinite.
Mimetite is known as a collector's specimen often creating botryoidal crusts
on the the surface of the specimen. It is not used as a gemstone due
to its softness.
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Wulfenite Mimetite
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$45.00 |
M604b
Here is a very nice specimen of Green Fluorite from China.
It has a beautiful range of nicely defined, nearly clear light Green Fluorite
crystals. It measures almost 2 3/4" x 2" x almost 1 3/4". Absolutely amazing.
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Fluorite, also referred to as fluor-spar, is a mineral composed of Calcium
Fluoride. It is a widely occurring mineral found world wide and is often
found with metallic minerals such as Galena, Sphalerite, Barite, Quartz
and Calcite. Fluorite may fluoresce strongly in ultraviolet light
which may be due to the presence of some impurities such as Yttrium.
Blue is the most common color but red, purple, green, yellow and white are
also frequent. It can be used in high performance telescopes, camera
lens, enamels and in the making of opalescent glass.
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Fluorite
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$30.00 |
M605c
Here is a very nice specimen of Smithsonite from Chihuahua, Mexico.
It has an unusual pretty pale Purple color combination desired by many
collectors. It measures 3" x almost 2 1/2" x nearly 1 3/4" thick with a natural unpolished botryoidal surface.
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Smithsonite is a mineral ore of zinc, commonly confused with
Hemimorphite until it was realized they are two distinct minerals. They
are similar in appearance and are found in similar colors. Smithsonite
often occurs in association with other minerals like Hemimorphite,
Willemite, Cerussite, Malachite and Azurite. It was named in honor of
James Smithson first identified the mineral and whose bequest established
the Smithsonian Institution.
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Smithsonite
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$35.00 |
M606b
Here is a very unique Beryl Crystal specimen from Casper Mountain,
Wyoming. This cool crystal has a dirty cream color, nearly the same color
as the surrounding matrix rock and is "as found" in nature. It measures 3
3/4" long x 3/4" in diameter with the matrix measuring 6" x 5 3/4" x 4".
The matrix rock is Sodaspar. This is a one-of-a-kind mineral
for the one-of-a-kind mineral collector.
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Beryl is a mineral composed of beryllium aluminium cyclosilicate.
Pure beryl is colorless, but it is frequently tinted by impurities;
possible colors are green, blue, yellow, red, and white. The name beryl is
derived from Greek which referred to a "precious blue-green
color-of-sea-water stone". Beryl of various colors is found most commonly
in granitic pegmatites, but also occurs in mica schists in the Ural
Mountains, and limestone in Colombia. Beryl is often associated with tin
and tungsten ore bodies and is found world-wide.
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Beryl
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$30.00 |
M607c
Here is a very different and nice interesting specimen of a Geode
filled with sparkly Quartz crystals surrounded by the yellow colored
matrix rock. The large and very pretty clear crystals
protrude in all different ways. The entire specimen is 5 1/2" x
4 1/2" x 4" with an all natural texture and finish. This
astonishing work of nature is from Morocco.
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Quartz is the second most common mineral
in the Earth's continental crust. It is mainly composed of Silica or
Silica based minerals. Although Quartz is known by a variety of names,
the most important distinction between types of Quartz is that of macro-crystalline,
individual crystals visible to the unaided eye, and micro-crystalline, where
aggregates of crystals are only visible under high magnification. There
are many forms of Quartz including Chalcedony, Amethyst, Citrine, and Carnelian
which are results of mineral impurities or heat treatments.
Geodes are geological rock formations which occur in sedimentary and
certain volcanic rocks. They are essentially rock cavities or vugs with
internal Crystal formations or concentric banding. The exterior is
generally Limestone while the interior contains Quartz Crystals and/or
Chalcedony deposits. If the Geode is completely filled with Crystal,
being solid all the way through, it is then called a nodule. |
Quartz Geode
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$26.00 |
M608b Here is
something really different for you mineral collection!! This is a
very nice, above average quality Pyrite Sun. It measures 4 3/8" x
3 1/2" x 1/8" and has a natural shiny appearance on both sides.
This beauty was found in the coal mines of Illinois and were surrounded by
Black shale and coal. They date in age to 350 million years old.
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Pyrite, or Iron Pyrite, is an Iron sulfide with isometric Crystals that
usually appear as cubes. It is brittle and can break or powder easily.
Its metallic luster and brass yellow hue have earned it the nickname of "fool's
gold" due to many miners mistaken it for the real thing. Ironically,
small quantities of actual gold are sometimes found in Pyrite. It is
the most common of the sulfide minerals and is usually found with other sulfides
or oxides in Quartz veins, sedimentary or metamorphic rocks.
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Pyrite Sun
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$20.00 |
M609c Here
is a new find at the Rock Shed. This is an excellent quality, larger
specimen of Pale Blue colored Barite crystals of different sizes and shapes
all on an unidentified matrix. The interesting and unique specimen measures
1 7/8" x almost 1 1/4" x nearly 1 1/8". The sparkly
Barite crystals are complimented by the natural rough texture of the
matrix and is from Morocco. Very, very nice!
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Barite or Baryte is a mineral consisting of Barium sulfate and is
generally white or colorless. The baryte group consists of baryte,
celestine, anglesite and anhydrite. Baryte commonly occurs in lead-zinc
veins in limestones, in hot spring deposits, and with hematite ore. It is
used in the manufacture of paints and paper. Although Barite contains a
'heavy' metal, Barium, it is not considered to be a toxic chemical because
of its extreme insolubility.
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Blue Barite
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$50.00 |
M610b Here is a
gorgeous specimen of Vanadinite on matrix. It measures 6" x
3 1/2" x 4 1/8" and has many sparkly Red
and burnt Orange colored hexagonal Vanadinite crystals all over the matrix.
This is a beautiful work of nature and very fragile. This mineral is from
Morocco.
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Vanadinite is a mineral belonging to the Apatite group of Phosphate
minerals. It is one of the main industrial Ores of the metal Vanadium
and a minor source of Lead. Vanadinite is relatively uncommon and is
associated with Galena, Wulfenite, Limonite and Barite. It is usually
bright red or orange-red in color although it may sometimes be brown, red-brown,
grey, yellow or colorless.
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Vanadinite
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$100.00 |
M611c This is a very
nice, above average quality Smokey Quartz specimen. Under close
inspection, this very cool crystal has lots of rutiles and phantom lines inside
that photographs don't do justice. It measures 4 3/4" long x 2 1/2" x 1 1/2" and has a pretty sparkly appearance. This
Smokey Quartz crystal is all natural and has not been heat treated but does
have minor tip
damage.
This material is from Arkansas.
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Quartz is the second most common mineral in the Earth's continental
crust. It is mainly composed of Silica or Silica based minerals.
Although Quartz is known by a variety of names, the most important distinction
between types of Quartz is that of macro-crystalline, individual crystals
visible to the unaided eye, and micro-crystalline, where aggregates of crystals
are only visible under high magnification. There are many forms of Quartz
including Chalcedony, Amethyst, Citrine, and Carnelian which are results of
mineral impurities or heat treatments.
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Smokey Quartz
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$22.00 |
M612b This is
a nice natural native copper specimen from Pennsylvania which has been
partly removed from the
matrix rock which was surrounding it. The white quartz matrix
rock is visible
in many areas. It measures 4 3/8" x nearly 2 1/8" x almost 1 1/4" and has a
natural texture and finish. Just a nice specimen of something
different!
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Copper is a reddish colored metal with a high electrical and thermal
conductivity. It has its characteristic color because it reflects
red and orange light and absorbs other frequencies in the visible spectrum
due to its band structure. It is in the same family as Silver and
Gold and is a malleable metal. It is beautiful natural or polished.
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Copper
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$40.00 |
M613b
Here is a gorgeous specimen of Vanadinite on matrix. It measures
3 1/2" x
2 1/2" x 1 1/2" and has many bright Red
and burnt Orange colored hexagonal Vanadinite crystals of all sizes.
This is a beautiful work of nature and is absolutely stunning. This mineral is from
Morocco.
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Vanadinite is a mineral belonging to the Apatite group of Phosphate
minerals. It is one of the main industrial Ores of the metal Vanadium
and a minor source of Lead. Vanadinite is relatively uncommon and is
associated with Galena, Wulfenite, Limonite and Barite. It is usually
bright red or orange-red in color although it may sometimes be brown, red-brown,
grey, yellow or colorless.
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Vanadinite
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$50.00 |
M614b
Here is a very nice, above
average quality specimen of Malachite. It has an unique fibrous
pattern and various pretty Green colors with an all natural velvet like texture.
The beautiful green mineral measures 4 7/8" x almost 2 7/8" x 1 7/8" thick
and has a very attractive appearance. Absolutely amazing.
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Malachite is a Copper Carbonate mineral that often forms botryoidal,
fibrous or stalagmitic masses. It is often the result of the weathering
of Copper Ores and is commonly found with Azurite, Goethite and Calcite.
It is typically associated with Copper deposits including Limestone which
is the source of the Carbonate. Malachite is found in many regions world
wide and is usually shaded green in color.
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Malachite
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$130.00 |
M615c
Here is something different for the mineral collector. This is a very
nice, above average quality Fluorite specimen. This new item is from
Purple Haze Pocket, Diana Maria Mine, Frosterley, Weardale County Durham,
England . The lovely
mineral specimen has very pretty purple colored Fluorite cube shaped
crystals all in a natural and
unpolished state. It measures 3 5/8" x 2 1/2" x 1 5/8" with an unique and beautiful appearance. Another photo
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Fluorite, also referred to as fluor-spar, is a mineral composed of Calcium
Fluoride. It is a widely occurring mineral found world wide and is often
found with metallic minerals such as Galena, Sphalerite, Barite, Quartz
and Calcite. Fluorite may fluoresce strongly in ultraviolet light
which may be due to the presence of some impurities such as Yttrium.
Blue is the most common color but red, purple, green, yellow and white are
also frequent. It can be used in high performance telescopes, camera
lens, enamels and in the making of opalescent glass.
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Fluorite
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$28.00 |
M616c
Here is something different for the mineral collector. This is a
very nice, above average quality combination mineral which includes White
Quartz, sparkly Pyrite and Galena all wrapped up in one super
specimen. The mineral group measures 2 1/2" x 2 1/2" x 1
5/8" and has
a beautiful appearance. Another photo
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Pyrite, or Iron Pyrite, is an Iron sulfide with isometric Crystals that
usually appear as cubes. It is brittle and can break or powder easily.
Its metallic luster and brass yellow hue have earned it the nickname of "fool's
gold" due to many miners mistaken it for the real thing. Ironically,
small quantities of actual gold are sometimes found in Pyrite. It is
the most common of the sulfide minerals and is usually found with other sulfides
or oxides in Quartz veins, sedimentary or metamorphic rocks.
Galena is the natural mineral form of Lead Sulfide. It is the
most important Lead ore mineral and is one of the most abundant and widely
distributed sulfide minerals. It is often associated with Sphalerite,
Calcite and Fluorite. Galena deposits often contain significant amounts
of Silver, Zinc, Cadmium, Antimony Arsenic and Bismuth. It is used as
a semiconductor in early wireless communication systems. It is usually
dark grey to black in color with a shiny iridescence.
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Pyrite-Quartz-Galena
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$22.00 |
M617c Here is a sparkly
Stilbite specimen. The pretty specimen has a nice unique
appearance with the light peach colored Stilbite on the matrix rock.
This cool mineral measures 3 3/4" x 3" x
nearly 2 1/4". A great way to begin your mineral collection! This material is from Jalgaon, India. Another photo
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Stilbite is another Silicate mineral from the Zeolite family.
It is often characterized by its sheaf like aggregates. The color is
usually white or pink and when the cleavage is perfect, will have a
distinct pearly luster.
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Stilbite
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$550.00 |
M619c This is an
amazing new item at the Rock Shed. This is a Limonite after Pyrite
Pseudomorph from Gachala, Columbia. This beautiful large specimen shows
the classic cross style of twinning from Columbia. It measures 3 5/8" x 3
3/4" x 3 1/2" and weighs a whopping nearly 4 1/4 pounds. It has several
areas where it's Limonite edges have chipped off throughout time exposing
a little bit of it's Pyrite center. Truly a collector's piece!
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Limonite after Pyrite is formed when Pyrite begins to decompose
through chemical weathering and the iron present in the mineral starts to
rust. Limonite is any impure hydrated iron oxide. Limonite is mostly clay
but also may contain phosphates and silica. Once the rust has started,
Limonite slowly starts to form. Limonite does not have one specific shape
or crystal structure. Limonite pseudomorphs (takes the external shape) of
other minerals such as Pyrite. Most Limonite has a brownish red color and
leaves varying streak of color as the composition of Limonite could be
made up of a different amount of phosphates or silica.
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Limonite
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$75.00 |
M620c Here is
something really different for you mineral collection!! This is a
very nice, very pretty lab grown Aluminum specimen. It measures 5
3/4" x
4 1/4" x almost 4 1/4" tall and has a natural
shiny appearance on all sides. This unique and
gorgeous specimen has numerous lovely shiny silvery crystals protruding
up from the base in all different directions. Some of the crystals
are loose to the touch but are attached and this is reflected in our
price. A wonderful and unique
specimen for your mineral collection!
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Aluminum is a silvery-white, soft, nonmagnetic, ductile and
malleable metal with appearance ranging from silvery to dull gray. It is
the third most abundant element (after oxygen and silicon), and the most
abundant metal, in the Earth's crust. It makes up about 8% by mass of the
crust but is so chemically reactive that native specimens are rare and
limited to extreme reducing environments. Instead, it is found combined in
over 270 different minerals. The chief ore of aluminum is bauxite.
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Aluminum
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$25.00 |
M621c
Here is a new item; a very nice, beautiful quality Danburite
specimen from Mexico. It measures 1 7/8" long x 7/8" wide x 1/2" thick and
has a natural very shiny appearance with excellent clarity, "rainbow"
reflections and sparkly inclusions. Nice!
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Danburite, is a relatively new gemstone
discovered in 1839 in Danbury, Connecticut. The original deposit is now
buried under the city of Danbury. With a hardness of 7, danburite is quite
hard and suitable for any kind of jewelry. Because of its high refractive
index, well cut danburites are remarkably bright and can look something
like diamonds. Today, most of colorless danburite comes from Mexico. It
makes an especially brilliant gem because of its extreme clarity.
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Danburite
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