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Page 6
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Cost
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Item
Description
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$25.00 |
M601b
Here is an above average quality piece of Kyanite from Brazil. This
is a nice specimen measuring 8 3/4" x 1 1/4" x 1 1/4" and has a very pretty
iridescent sheen. This mineral has a beautiful, soft Blue matrix with
larger areas of White Quartz Crystals. A very nice, unique specimen.
Kyanite is a typically blue Silicate mineral that is commonly found in
Aluminum rich metamorphic pegmatites and/or sedimentary rock. It is
used primarily in refractory and ceramic products including porcelain plumbing
fixtures and dinnerware. It is also used in electrical insulators and
abrasives. It is definitely a collector's mineral.
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Kyanite-Quartz
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$25.00 |
M600b
Here is something different for the mineral collector. This is a larger
Aragonite specimen. It measures 3 1/2" x 1 5/8" x 2" and has a natural
White color with a very sparkly appearance. This material has a botryoidal
shape and lots of character.
Aragonite is a Carbonate mineral that can occur in conjunction with
Calcium Carbonates. Aragonite differs from Calcite in the formation
of the Crystal shapes which can be in lattice, crystal, columnar or fibrous
in many different designs, shapes and sizes. Aragonite will form in
mollusk shells, oceans and salt water caves as inorganic precipitates called
marine cements and speleotherms. Ammolite is a form of Aragonite with
impurities that make it iridescent and valuable as a gemstone.
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Aragonite
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$16.00 |
M602b
This is something different for the mineral collector. Here is a larger
section of a dark Purple Amethyst Geode. The specimen measures 6 3/4" x
3 1/2" x 1 5/8" and has a natural sparkly appearance. This lovely piece
has an array of deep Purple Crystals.
Another photo.
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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$12.00 |
M617b
This is a very nice specimen of Vanadinite Crystals on matrix.
This mineral is from Morocco. It measures 2 5/8" x 1 1/2" x
7/8" and has
many hexagonal Vanadinite crystals. This is a beautiful work of nature
and very fragile. Another photo.
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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$20.50 |
M605b
Here is a very nice grouping of Hemimorphite-Calcite Crystals setting on a
dark Orange base of Limonite. It measures 3 1/2" x 3" x 1 1/2" with
a natural rough appearance and many differently shaped Citrine colored Crystals.
A different mineral for the different collector. Hemimorphite is
a sorosilicate mineral that is chiefly associated with Smithsonite.
It commonly forms crystalline crusts and layers and also massive, granular,
rounded aggregates or finely shaped clusters of crystals. It may fluorescence
a strong green in UV short wave light and weak pink in UV long wave light.
Limonite is an ore consisting of a mixture of hydrated Iron Oxide-Hydroxide
of varying composition of minerals such as Goethite, Lepidocrocite, or Jarosite.
It has been mined with Hematite as an Ore for the production of Iron. Limonite
is heavy and has a yellow-brown color. It is often used as the pigment
ochre in many paints.
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Calcite-Hemimorphite-Limonite
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$28.00 |
M616b
Here is something different for the mineral collector. This is a
very nice, above average quality combination mineral which includes White
Quartz, Yellow Calcite, sparkly Pyrite and Galena all wrapped up in one super
specimen. The mineral group measures 3 1/2" x 3 1/2" x 1 3/4" and has
a beautiful appearance. 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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Pyrite-Quartz
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$18.00 |
M607b
Here is a very pretty, larger Selenite Free Form. It measures
approximately 7 1/2" x 2 1/2" x 2 3/8" and has not been polished. It has
a flat bottom with a very unique, natural stature. It is very similar
to the Selenite lamps sold on the light and lamp pages of our web site but
it does not support a corded light. A very beautiful addition to any
rock collection.
Another photo.
Selenite, also known as Satin Spar, Desert Rose and Gypsum Flower, are
the four Crystalline varieties of Gypsum. It is a very soft material
composed of Calcium Sulfate. Selenite is often transparent and colorless.
If color is present it is often due to impurities or presence of other minerals.
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Selenite
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$21.00 |
M613c Here is a larger
specimen of Hemimorphite. This mineral measures 4" x 4" x 1 3/8" and
has a white Calcite covering. A very nice, very different mineral for
your collection.
Hemimorphite is a Silicate mineral that is chiefly associated with Smithsonite.
It is more rarer than Smithsonite due to the development of Crystals.
It may show strong green fluorescence in short wave ultraviolet light and
weak light pink fluorescence in long wave ultraviolet light. It is found
worldwide
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Hemimorphite
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$24.00 |
M615b
Here is a very nice interesting specimen of Dolomite resting in a
bed of Crystal Quartz. It measures 2 1/2" x 2 3/4" x 2 1/2" and has
a natural texture and finish. This mineral has several well defined
sparkly-opaque, Peach Dolomite Crystals with of shiny, sparkly Gold Pyrite
accents. This material is from Shangbao near Leiyang Hunan Province,
China. Dolomite is a sedimentary carbonate rock and a mineral which
is composed of Calcium and Magnesium. It is sometime referred to as
Dolostone or Dolomitic Limestone. It is used as an ornamental stone,
as raw material for the manufacture of cement, added to soil to lower acid
levels and as a nutritional supplement.
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Dolomite-Quartz-Pyrite
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$40.00 |
M604c
This is a Apophyllite-Calcite specimen from India. It measures
5 1/2" x 4 1/2" x 3" and nice, natural sheen. This Crystal cluster has
several very well defined Crystal cubes with clear facets. The larger
minerals has a druzy White base which resembles frosty snow.
Another photo.
Apophyllite, sometimes referred to as "fish eye", is from the mineral
group known as Phyllosilicates which also include Mica. This mineral
has a tendency, like Mica, to flake off and fall apart when heated which is
due to water loss. They are typically found with igneous rocks such
as Basalt. Although these minerals are relatively unfamiliar to the
general public, Apophyllites are fairly prevalent around the world.
They are popular collector's mineral and can form "natural pyramids" when
subjected to rock tumbling.
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Apophyllite-Calcite
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$40.00 |
M614b
Here is an above average quality
specimen of Malachite. The mineral measures 2 1/2" x 2" x 1 1/2" and
has a nice appearance. It has an unique botryoidal pattern and a bright
Green color. Absolutely amazing.
Another photo.
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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$16.00 |
M603b
Here is a very nice, very interesting specimen
of Lapis from Afghanistan. It measures 2 1/2" x 2 1/2" x 2 1/4" and
has a pretty Blue and White color. This piece has several areas of White
Quartz and sparkly Pyrite. Just beautiful!
Another photo.
Lapis is a stone with a long tradition of being considered a gem.
It is usually deep blue in color and is opaque. It is a rock and not
a mineral as it is made up from various other minerals. The main component
is Lazurite which is a Feldspar Silicate. Lapis may also contain Calcite,
Sodalite and Pyrite. It is found worldwide.
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Lapis
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$18.00 |
M610b Here is a very
nice, larger specimen of Vanadinite on matrix. This mineral is from
Morocco. It measures 3 3/8" x 2" x 1" and has many hexagonal Vanadinite
crystals. This is a beautiful work of nature and very fragile.
Another photo.
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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$35.00 |
M606b
Here is a very unique specimen combination of Okenite, Phrenite, and Calcite
Crystals in a Limestone matrix. This specimen is from Maharashtra, India.
It measures 6 1/2" x 3 1/2" x 2" with the majority of the mineral on one side
of the specimen. This mineral can not be polished as it would destroy
the soft, fuzzy spherical Okenite crystals and possibly dislodge the smaller
Phrenite bubble-like spheres. This is a one-of-a-kind mineral for the
one-of-a-kind mineral collector. Okenite is part of the Calcium Silicate
family and is an unusual mineral. It frequently appears as a cotton-ball
cluster with other minerals in matrix. The color is usually white but
may have a yellow or blue tint. Okenite has very slender long, thread
like fibers that make up a spherical or rounded aggregate. The Okenite
clusters may bring out the urge to touch the fine fibers and to test its softness.
We suggest refraining from this as the crystals are very delicate and once
touched, they are never the same again.
Phrenite is a mineral from the Calcium Aluminum Silicate group.
It can be found in shades of green, yellow or brown as well as white.
Some specimens are gem quality and make beautiful jewelry. It is found
world wide but most notable deposits are found in Australia, South Africa,
Germany and the United States.
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Okenite-Phrenite
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$35.00 |
M609b
Here is a new find at the Rock Shed. This is an above average quality,
larger piece of Goethite. It measures 4" x 2" x 3 1/2" and has a natural
rough texture. Goethite has a White Crystalline Calcite structure with
unique Iron Ore compositions. This material is from Mexico.
Goethite is an Iron bearing Oxide mineral found in soil and other low temperature
environments. Historically, Goethite has been used as a paint pigment
found on cave paintings in France. Its main modern use is that of an
Iron Ore content or objects using Iron Ore. Goethite is found worldwide
usually in the form of concretions, stalactitic formations, oolites, reniform
or botryoidal accumulations.
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Goethite
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$25.00 |
M612c This is
something different for the mineral collector!! Here is a very pretty
Quartz-Apophyllite-Chalcedony specimen from Jalgaon, India. The larger
combination mineral measures 2 1/2" x 4 1/4" x 2" and has a shiny sparkly
appearance. The mineral has some very amazing Chalcedony Druzy Crystal
points as well as several White Apophyllite Cubes that all rest in a bed of
Grey Druzy Quartz Crystal. A one-of-a-kind find for the mineral collector.
Another photo.
Apophyllite, also a Zeolite, is Silicate mineral with very well
defined clear Crystals and is very popular as a collector's mineral.
The Crystal structure will refract like in obvious rainbows and can form "natural
pyramids" when tumbled.
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Apophyllite-Chalcedony-Quartz
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$25.00 |
M608c Here is something
really different for you mineral collection!! This is a very nice, above
average quality Pyrite Sun. It measures 3" x 3" x 3/16" and has
a natural, shiny appearance. This beauty was found in the coal mines
of Illinois and are surrounded by Black shale and coal. They date in
age to 350 million years old.
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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$40.00 |
M611c This is a very
nice, above average quality Smokey Quartz specimen. It measures 3 1/4"
x 3 1/4" x 3 1/2" and has a pretty sparkly appearance. This Quartz material
has been heat treated which gives it the deep, rich Black color. This
material is from Arkansas.
Another photo.
Another photo.
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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