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Cost
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Item
Description
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Click Picture
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$40.00 |
M217c Here is
a new find in the Rock Shed mineral department. This is an above average
quality, larger piece of Goethite. It measures 4" x 3 1/2" x 2 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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$45.00 |
M218b This is
a very nice, larger specimen of a Hemimorphite stalactite. It measures
5 1/2" x 3 1/2" x 3 1/4" and has a nice sparkly appearance. This mineral
has a pretty Silver-Grey color with numerous individual Crystals resting in
a Limonite base. Another photo.
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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$25.00 |
M216b
Here is an interesting find. This is a very nice specimen
of Stibnite from China. It measures 2" x 1 1/2" x 1/4" and has a sparkly
Grey metallic color. This is an interesting specimen that has areas
of Yellow Calcite and an unique appearance.
Another photo.
Stibnite, also known as Antimonite, is a Sulfide mineral that forms
grey Crystals. It is the most important source for the rare Metalloid
Antimony. It is used in the manufacture of fireworks, batteries, safety
matches and mascara.
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Stibnite
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$40.00 |
M200c This is
a nice specimen of natural, native Copper from Michigan. The mineral
is rough, usually found naturally about ground, just waiting to be picked
up. This piece has been slightly polished to show the true beauty of
the Copper which also gives is a high gloss finish. 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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$12.50 |
M208b
Here is a very interesting specimen of Black Tourmaline.
This specimen is from the Black Hills of South Dakota. It measures 3
1/2" x 1 3/4" x 1 1/2" and shiny finish. This mineral has Mica and Quartz
attached to the outside. It has a very unique shape and design.
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.
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Tourmaline
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$15.00 |
M213c
Here is a very nice interesting specimen of Dolomite resting in a bed of Crystal
Quartz. It measures 2" x 2 3/4" x 1" and has a natural texture and finish.
This mineral has several well defined sparkly-opaque, 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-Pyrite-Quartz
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$12.00 |
MN21c
This is a nice larger specimen of Galena. It measures
3 3/8" x 3 5/8" x 1" and has a nice metallic luster. It is a unusual
piece in that it has several cubical crystals on the top and bottom of the
specimen and has a vary of colors ranging from iridescent silver to a bronze
copper. A great addition to any mineral collection. 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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Galena
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$15.00 |
M215b
A nice specimen of natural Copper from Keweenaw Peninsula, Michigan. This
freeform was originally in a mineral based matrix that was chipped away to
reveal the beautiful Copper mineral. It measures 3 1/4" x 2" x 1" with
a natural sheen. 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 Free Form
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$15.00 |
M204b
Here is a nice specimen of natural Chalcocite, Covellite and Pyrite from
the Leonard Mine (now closed) in Butte, Montana. It measures 3 3/4"
x 2 1/8" x 2 1/2". A really neat mineral to add to your collection.
Chalcocite is an important Copper Ore mineral. It is opaque with
a metallic luster. It is usually dark gray to black in color.
It has been mined for years and is one of the most profitable of the Copper
Ores.
Covellite is a crystalline form of Copper Sulfide and usually has an
enchanting indigo blue color. It is commonly found with and as a coating
on Chalcocite, Chalcopyrite, Bornite, Enargite and Pyrite.
Pyrite is an Iron sulfide with an isometric structure. 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.
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Chalcocite-Covellite-Pyrite
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$10.00 |
M202b Here
is some very nice, medium sized pieces of Peacock Copper Ore. Each piece
measures approximately 1 3/4 to 3" in size with the total approximate weight
of 1/2 to 1 lb. in weight. We offer a good variety of color, size and
design. Unfortunately, there is NO choice in specimens as we bag the
pieces up straight from the box. The set would make a great educational
tool for scouts or schools. Items will be similar to items in photo.
You will receive three (3) pieces of our choosing.
Peacock Copper Ore is a Copper Iron mineral that is closely related
to Bornite and Chalcopyrite. Although it is sometimes confused with
Pyrite, Peacock Copper is a mixture of Copper and Iron whereas Pyrite is an
Iron derivative.
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Peacock Copper Ore
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$20.00 |
M214b Here is
a rather unique find at the Rock Shed. This is a high quality specimen
of rough Hematite. It measures 3 1/2" x 3" x 2" and has its own natural
shine. This mineral has an unique bubbly, botryoidal design and rich
color on both sides.
Hematite is a mineral form of Iron oxide. It is a very common
material that has a black to steel to silver-grey color and may also appear
reddish brown. Hematite is a heavy metal and when it is polished it
is consider to many to be of gemstone quality. It is very popular in
jewelry and Native American art.
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Hematite
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$50.00 |
M210c
Here is something different for the mineral collector.
This is a combination mineral containing Sphalerite, Calcite, Quartz, Pyrite
and what we believe to be Barite. It measures 3 1/4" x 2 3/4" x 2 1/4"
and has a natural sparkly, druzy-like appearance. This mineral is from
Dalnyegorsk, Russia. The mineral is unique in that each mineral demonstrates
a difference texture and color. A super mineral for that super mineral
collector.
Sphalerite is a mineral that is the chief ore of Zinc. It consists
mainly of Zinc Sulfide in crystalline form but almost always contains valuable
Iron. When the Iron content is high, it is an opaque black variety called
Marmatite. It is usually found in association with Galena, Pyrite, Calcite,
Dolomite and Fluorite. It is usually yellow, brown or gray to gray-black
in color and may have a shiny or dull luster or sheen.
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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Sphalerite-Calcite-Quartz-Pyrite-Barite
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$9.50 |
M205c
Here are 3 Copper nuggets from Keweenaw
Peninsula, Michigan. They were rescued after a short time in a grinding
mill. The nuggets measure approximately 1 1/4" x 1" x 1/2" with a nice
natural polished appearance. This item will be similar to what is pictured.
Makes a great gift or educational tool. 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 Nuggets
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$15.00 |
M209b
Here is a very nice, above
average quality, larger Pyrite nugget from Peru. It measures 3 1/4"
x 2 3/4" x 2" and has a natural shiny finish. This beauty is a one of
a kind, very well defined specimen that will not be duplicated. Pyrite
is an Iron sulfide with an isometric structure. 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.
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Pyrite
Nugget
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$30.00 |
M206c
This is a very nice, large
Galena specimen. It measures 2 3/4" x 3 1/2" x 2" and has a natural
shiny appearance. The mineral is quite heavy as it falls into the heavy
metal category of minerals. It has a nice character and design.
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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Galena
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$5.50 |
M201b
This is for 1/4 lb (approximately 25-30 pieces) of Copper Nuggets. These
are natural Copper Nuggets from Michigan. It is real native Copper which
has been salvaged from a ball mill which was used to break the rock away from
the copper and clean it. Item will be similar to picture. 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 Nuggets
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$32.00 |
M211c
Here is a very nice Orange-Red Dog Tooth Calcite Crystal. It measures
4" x 2 1/4" x 1 3/4" and has a naturally smooth exterior. This specimen
has an almost translucent Crystal points with dark Red pyramid-shaped centers
and an iridescent shine. A super gift. Calcite is a Carbonate
mineral that is most widely distributed on the Earth's surface. It is
a common constituent of sedimentary rocks with Limestone in particular.
A Calcite formation can take on many different shapes and sizes which is dependent
on the location, ground water occurrence and temperature. Calcite is
usually white or colorless but can be gray, red, yellow, green, blue, violet,
brown or black. The deeper the color is usually indicative of the definitive
impurities from the earth or water.
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Dog Tooth Calcite
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$125.00 |
M207c This
is an above average, nicely polished Septarian End Cut from Utah. It
measures 6 1/4" x 7" x 4" and has been polished on the front face. The
Septarian Nodule has a beautiful hollow center filled with pretty Gold Calcite.
The hollow nodules are a rarity and very difficult to find. A definite
beauty to behold.
Septarians are commonly composed of a carbonate mineral such as Calcite,
a microcrystalline form of Silica as in Flint or Jasper, or an Iron Oxide
such as Hematite. These specimens are also known as a concretion which
is a type of sedimentary rock.
Septarians were formed millions of years ago by sediment forming around
a fossil to create a mud ball transforming the fossil into Calcite and Aragonite.
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Septarian End
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