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Cost
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Item
Description
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$40.00 |
M217b
Here is a new find in the Rock Shed mineral department. This is an above
average quality, larger piece of Goethite. It measures 3" x 3 3/4" x
2 1/4" and has a natural rough texture. Goethite has a White Crystalline
Calcite structure with unique Iron Ore compositions. This material is
from Mexico. Another photo.
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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$28.00 |
M218c
This is an interesting mineral combination! Here is an Apophyllite-Stilbite
mix. This fantastic mineral measures 4 3/4" x 3 7/8" x 2 3/8" and has a super
sparkly appearance. A great way to begin your mineral collection with
a smaller collection all in one!! This material is from Nasik, India.
Another photo.
Apophyllite, 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-Stilbite
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$25.00 |
M216c
Here is an interesting find. This is a very nice
specimen of Stibnite from China. It measures over 2 1/4" x 3/4" x
3/4" and has a sparkly Grey metallic color. This is an interesting specimen
that has an unique shape and 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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$11.00 |
M252b
This is a nice specimen of natural, native Copper from Keweenaw Peninsula,
Michigan. This nugget specimen was rescued after a short time in a grinding
mill. It measures 2 1/2" x 1" x 5/8" and has a smooth exterior.
Another photo.
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.
Click
here to view more Copper specimens !!
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Copper
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$45.00 |
M208b
Here is a very interesting specimen of Black Tourmaline from
Brazil. It measures 3 1/8" x 2" x 1 3/4" and a semi-shiny finish.
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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$65.00 |
M213b
Here are very nice interesting specimens of Apatite resting in a bed of
Orange Calcite. It measures 5 1/4" x 4" x 2 3/4" and has a natural texture
and finish. This mineral has several well defined sparkly green Apatite
Crystals with shiny, sparkly Calcite in Orange with Purple accents.
This material is from the Yates Mine, Otter Lake, Quebec, Canada.
Another photo.
Another photo.
Apatite is a part of the phosphate group of minerals that was formed
in igneous rocks and in metamorphosed limestone. Apatite is translucent
or transparent and usually green in color but can be colorless, white, yellow,
bluish, reddish, brown or purple.
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Apatite - Magnetite
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$35.00 |
M201b
Here is a nice, above average quality Heulandite specimen
from Nasik, India. It measures 4 1/2" x 4" x 3 1/4" and has a very
unique, natural exterior. It has a shaded Peach color and has a very
different natural design. An interesting, one of a kind specimen for your
mineral collection.
Another photo.
Heulandite is a mineral series from the Zeolite group. The Crystals
have a coffin-shaped habit but may also form simple rhombic prisms. The
mineral is usually colorless or white but may have orange, brown, yellow,
brick-red or green inclusions due to a Celadonite content. |
Heulandite
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$16.00 |
M215c
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 1/2" x 2 1/2" x 1"
with a natural sheen. Another photo.
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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$25.00 |
M204b
Here is a nice specimen of Stilbite and druzy Quartz mix. This is
a Zeolite mineral from Aurangabad, India. It measures 3 3/4" x 2 1/8"
x 2 1/2". A beautiful mix of a Blue-Grey druzy Quartz bed with 2 small
White Stilbite Crystals. Absolutely amazing. 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.
Stilbite is another Silicate mineral from the Zeolite family.
It is often characterized by its sheaf like aggregates. The color is
usually white and when the cleavage is perfect, will have a distinct pearly
luster.
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Stilbite-Quartz
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$10.00 |
M202b
Here is some very nice, smaller sized pieces of Peacock Copper Ore.
Each piece measures approximately 3/4" to 1 1/2" in size with the total
approximate weight of 1/2 lb. 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 ten (10) 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 |
M214c Here is
a rather unique find at the Rock Shed. This is a high quality specimen
of rough Hematite. It measures nearly 2 7/8" x 1 5/8" x 13/4" and has
its own natural shine. This mineral has an unique bubbly, botryoidal
design and rich color.
Another photo.
Another photo.
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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$48.00 |
M210c This
is a very nice, above average quality Smokey Quartz specimen. It measures
4 3/4" x 3" 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.
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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$18.00 |
M205b
This is a nice specimen of natural,
native Copper from Keweenaw Peninsula, Michigan. This nugget specimen
was rescued after a short time in a grinding mill. It measures 2 3/8"
x 1 1/4" x 1 5/8" and has a smooth exterior.
Another photo.
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 Nugget
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$20.00 |
M209c
Here is a very nice, above average quality, combination mineral of
Dolomite and Quartz Crystals. This material is from Shangbao, near Leiyang
Hunan Province in China. It measures 2 3/4" x 2 1/2" x 2" and has a
natural sparkly finish. This beauty is a one of a kind, very well defined
specimen that will not be duplicated.
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.
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
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$20.00 |
M206c
This is a very nice Galena
specimen. It measures nearly 1 7/8" x 1 1/2" x 1 1/2" 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.
Another photo.
Another photo.
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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$54.00 |
M212c
This is a very nice, larger
Rhodocrosite specimen. It measures 2 3/4" x 2 3/8" x over 1 3/4" and
has a natural appearance. It has a nice character and a very pretty
Pink color. A great specimen of a hard find material.
Another photo
Another photo
Rhodocrosite is a Manganese Carbonate mineral. It is typically
a rose-red color, but impure specimens can be shades of pink to pale brown.
It is used as a key component of low-cost stainless steel and certain Aluminum
alloys. Quality banded specimens are often used for decorative stones
and jewelry, although it is relatively soft and difficult to cut.
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Rhodocrosite
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$70.00 |
M203b
Here is something different from the Mineral department at the Rock Shed.
This is a larger, above average quality Ferro-Columbite specimen from the
Etta Mine in Keystone, South Dakota. It measures 3 3/4" x 2" x 1 1/2"
and has a natural rough exterior. This mineral has a secondary Soda-Spar
mineral attached on several places. This is one of our rarer minerals
we have on hand, so if it sparks your interest, you will definitely have a
one-of-a-kind mineral. Ferro-Columbite, also known as Niobite or
Niobite-Tantalite, is a black mineral that is an ore of Niobium and Tantalum.
It has a sub-metallic luster and a high specific gravity. It is a Niobate
of Iron and Manganese which contains Tantalate of Iron. It is used for
heat resistance.
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Ferro-Columbite
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$16.00 |
M211b
Here is a very nice Dog Tooth Calcite Crystal. It measures 4 1/4"
x 2 7/8" x over 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.
Another photo.
Another photo.
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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$35.00 |
M207c
This is an above average, nicely polished Septarian Slab from Utah.
It measures 7 1/8" x 6 3/8" x 3/8" and has been polished on the front
face. This Septarian Nodule has beautiful Golden Yellow Calcite bordered
with pretty brown Aragonite. A definite beauty to behold.
Another Photo
Click
Here to See More Septarian Specimens.
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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