Minerals from Different Locations

Page 6

Cost

Item Description

Click Picture
for Larger Image

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.

Kyanite-Quartz

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.

Aragonite

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.

Amethyst

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.

 Vanadinite

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.

Calcite-Hemimorphite-Limonite

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.

 Pyrite-Quartz

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. 

Selenite

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

Hemimorphite

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-Pyrite

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.

Apophyllite-Calcite

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.

Malachite

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.

Lapis

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.

Vanadinite

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.

Okenite-Phrenite

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

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.

Apophyllite-Chalcedony-Quartz

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. 

Pyrite Sun

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.

Smokey Quartz