Minerals from Different Locations

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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.

Goethite

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Azurite is a mineral belonging to the Carbonate group of minerals.  It is commonly found with Malachite, Goethite and Calcite.  It is typically associated with Copper deposits including Limestone which is the source of the Carbonate.

Azurite Nodule

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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.

Stibnite

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Click here to view  more Copper specimens !!

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.

 Copper

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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.

Tourmaline

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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. 

Apatite - Magnetite

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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.

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.

Quartz, Dolomite, and Calcite

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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.

Fluorite

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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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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.

Peacock Copper Ore

M214c   Here is a rather unique find at the Rock Shed.  This is a high quality specimen of rough Hematite.  It measures almost 2 7/8" x nearly 1 3/4" x  1 3/4" and has its own natural shine in areas.  This mineral has an unique bubbly, botryoidal design and rich color.

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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.

Hematite

M210b  This is a very nice, above average quality Smokey Quartz specimen.  It measures over 5" x 4 3/8" x 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.

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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.

Smokey Quartz

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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.

Float Copper Nugget

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.

Dolomite-Quartz

M206b   This is a very nice Galena specimen.  It has a nice character and design. It measures 1 3/4" x 1 5/8" x nearly 1 1/2" and has a natural shiny appearance.  The mineral is quite heavy for it's size as it falls into the heavy metal category of minerals. This specimen weighs nearly 3/4 of a pound.

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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.

Galena

M212b   This is a very nice, larger Rhodocrosite specimen.  It measures nearly 2 1/8" x almost 2" x 1 1/2" and has a natural appearance.  It has a nice character and a very pretty Pink color. A great specimen of a hard find material.

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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.

Rhodocrosite

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.

Ferro-Columbite

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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.

Dog Tooth Calcite

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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.

Septarian End