MINERALS

A Mineral is generally an inorganic, naturally occurring, organized crystalline structure composed of a single chemical compound or element.

(CLICK ON THUMBNAIL FOR LARGER VIEW)
ANHYDRITE
(CALCIUM SULFATE)
from NAICA, MEXIC0

Anhydrite is a common sedimentary mineral that is the result of the dewatering of the rock forming mineral Gypsum.

3 5/8" X 1 7/8"

$45.00
APOPHYLLITE w/STILBITE
(HYDRATED POTASSIUM CALCIUM SODIUM SILICATE FLUORIDE HYDROXIDE)
from POONA, INDIA

Found in ancient lava and basalt flows.  The crystals grow in the solid cavities, vesicles, or geodes formed by air bubbles when the rock was molten.

4" x 2 1/2"

$30.00
GREEN APOPHYLLITE ON HEULANDITE
(HYDRATED POTASSIUM CALCIUM SODIUM SILICATE FLUORIDE HYDROXIDE)
from MAHARASHTRA, POONA, INDIA

Found in ancient lava and basalt flows.  The crystals grow in the amygdules formed by air bubbles when the rock was molten.

3 1/2" x 2 3/4"

$30.00
AQUAMARINE
(BERYLIUM ALUMINUM SILICATE)
from MINA GERAIS, BRAZIL

Aquamarine is the blue or blue-green variety of the mineral BERYL.  They often form flawless crystals and are colored by trace amounts of iron.  Aquamarine is the birthstone for March.

3" x 2"

$65.00
AQUAMARINE w/SMOKEY QUARTZ
(BERYLIUM ALUMINUM SILICATE)
from GRAVES MT., GA

Aquamarine is the birthstone for March.
 Aquamarine is the blue or blue-green variety of the mineral BERYL.  They often form flawless crystals and are colored by trace amounts of iron.
2 5/8" X 1 3/4"

$30.00
AURICHALCITE
(ZINC COPPER CARBONATE HYDROXIDE)
from OJUELA MINE,
LEVEL 4
MAPIMI, MEXICO

A secondary mineral that forms in the oxidation zones of zinc copper deposits.

4" x 2 1/2"

$50.00
AZURITE w/MALACHITE
(COPPER CARBONATE HYDROXIDE)
from MOROCCO

A secondary copper mineral producedd by weathering of copper ore depsits.
Malachite is closely associated and can also replace Azurite, making an exact copy of azurite crystals that are green instead of blue.

4 1/2" x 2 3/4"

SOLD
CHOCOLATE "DOGTOOTH" CALCITE
(CALCIUM CARBONATE)
from DURANGO, MEXICO

One of the most common minerals on earth that forms in many different geological environments.  It can form rocks of considerable mass and is a significant part of all three major rock classification types.

3 1/4" x 2 3/8"

$25.00
CAVANSITE
(HYDRATED CALCIUM VANADIUM SILICATE)
from MAHARASTRA, NASHIK, INDIA

Cavansite is a relatively rare mineral that occurs as a secondary mineral in basaltic and andesitic rocks along with a variety of zeolite minerals.

8" x 6"

SOLD
CAVANSITE
(HYDRATED CALCIUM VANADIUM SILICATE)
from MAHARASHTRA, WAGOLI QUARRY
 POONA, INDIA

Cavansite is a beautiful rare mineral that is found in only a few localities.  By far the best crystals come from the zeolite quarries of Poona, India.

2 3/4" x 2 1/4"

$70.00
CHALCOTRICHITE w/AZURITE
(COPPER OXIDE, VAR. OF CUPRITE)
from SHANNON MT., MORENCI MINE
MORENCI, AZ

A variety of Cuprite that forms thin red fibrous sprays or mats of hair-like crystals.  Cuprite is still mined in many places and is a major ore of Copper.

3 1/2" x 2 1/2"

$30.00
CINNABAR
on DOLOMITE
(MERCURY SULFIDE)
from WASHAM COUNTY
GUIZHOU PROV., CHINA

Cinnabar is the main ore of Mercury and generally occurs as a vein-filling mineral associated with volcanic activity and alkaline hot springs..

2 3/4" x 1 1/4"

$30.00
NATIVE COPPER
(Cu, ELEMENTAL COPPER)
from CALADONIA MINE
ONTONOGON, MI

Copper is a ductile metal with very high thermal and electrical conductivity.

5" x 3"

SOLD
CREEDITE
(HYDRATED CALCIUM ALUMINUM SULFATE HYDROXIDE FLUORIDE)
from MAPIMI, DURANGO, MEXICO

Creedite is a rare hyrdoxylhalide mineral and usually forms from the oxidation of fluorite ore deposits.

4 7/8" x 4 1/4"

$75.00
DOLOMITE
(CALCIUM MAGNESIUM CARBONATE)
from NEW YORK

Common sedimentary rock forming mineral that can be found in massive beds hundreds of feet thick.
It is originally deposited as calcium/aragonite rich limestone and is altered to Dolomite during a process called diagenesis.

4 1/2" x 2 1/4"

$20.00
BLUE FLUORITE
(CALCIUM FLUORIDE)
from BLANCHARD MINE
BINGHAM, NM

Fluorite is known and prized for it's luster and rich variety of colors.  Many samples of Fluorite are fluorescent under ultraviolet light.  Fluorite also exhibits the properties of thermoluminescence or the ability to glow when heated.

6 1/4" x 2 1/2"

SOLD
GREEN FLUORITE
(CALCIUM FLUORIDE)
from CHINA

The color of Fluorite is extremely variable and even a single crystal can be multi-colored.
It is the most popular mineral for collectors second only Quartz.   It is by far one of the most beautiful and interesting minerals available.

7 1/4" x 4"

SOLD
PURPLE FLUORITE
(CALCIUM FLUORIDE)
from CAVE-IN-ROCK, IL

Fluorite comes in such a wide variety of colors that it has earned the reputation as "THE MOST COLORFUL MINERAL IN THE WORLD".

3" x 2 3/8"

SOLD
PURPLE FLUORITE
(CALCIUM FLUORIDE)
from CAVE-IN-ROCK, IL

The rich purple color is the most famous and popular color.  Fluorite has several different crystal habitats that always  produce well formed, good, clean crystals.

6" x 2 1/2"

SOLD
RAINBOW FLUORITE
(CALCIUM FLUORIDE)
from HUNAN PROV., CHINA

Color zoning or banding is very common in Fluorite.  The color of the Fluorite is determined by factors including impurities, exposure to radiation, and the size of the color centers.

6" x 4" x 1/2" thick

SOLD
HEULANDITE
(HYDRATED CALCIUM SODIUM ALUMINUM SILICATE)
from POONA, INDIA

3 1/2" x 3"

SOLD
KYANITE and QUARTZ
(ALUMINUM SILICATE)
from GRAVES MT., GA

Commonly found in aluminum-rich metamorphic pegmitites and/or sedimentary rock.

3 1/2" x 2 1/4"

$20.00
MALACHITE
(HYDRATED COPPER CARBONATE)
from ZAIRE, SO. AFRICA

Occurs in the oxidation zone of copper ore deposits.

4" x 2 7/8"

$50.00
MARCASITE w/AGATE
(IRON SULFIDE)
from PERU

Marcasite is a polymorph of Pyrite, meaning that it has the same chemistry as pyrite, but a different structure, and a different symmetry and crystal shapes.  It occurs in sedimentary rocks and in low temperature hydrothermal veins.  It can form as a primary or secondary mineral and usually forms under low-temperature highly acidic conditions.

3 1/2" x 3 3/4"

SOLD
OKENITE GEODE
(HYDRATED CALCIUM SILICATE)
from MAHARASHTRA, POONA, INDIA

Okenite is a silicate mineral usually associated with zeolites and occurs as a "contact mineral" in basalts.    It is commonly found as "cotton-ball" formations as clusters of straight, radiating, fibrous crystals that are both bendable and fragile.  The crystals are extremely delicate and once touched are never the same.

6 1/2" x 5"

SOLD
PREHNITE w/EPIDOTE
(CALCIUM ALUMINUM SILICATE HYDROXIDE)
from DJOUGA, BENDUKO, BUFAUFABE CERCLE, KAYES REGION, MALI

Occurs in cavities in schists and calc silicate rocks as well as in basic igneous rocks, rarely also in granite.  Prehnite is a phyllosilicate of calcium and aluminum.  It is the first mineral to be named after someone.  It was first described in 1789 and named for Colonel Hendrik Von Prehn.

1 3/4" x 1 3/8"

SOLD
PREHNITE w/OKENITE
(CALCIUM ALUMINUM SILICATE HYDROXIDE)
from MAHARASHTRA, NASHIK, INDIA

Prehnite is often associated with zeolites but is a member of the Phyllosilicates Subclass.  It is formed as a result of low grad metamorphism usually from hydrothermal solutions.

5" x 4 1/2"

$75.00
PYRITE
(IRON SULFIDE)
from PERU

Also known as "Fool's Gold", Pyrite is the most common of the sulfide minerals.  It is usually found with other sulfides or oxides in quartz veins, sedimentary rock, metamorphic rock, coal beds, and as a replacement mineral in fossils.  Pyrite is the most important source of sulphur after native sulphur.

3 1/2" x 2 3/8"

$40.00
PYRITE SUN
(IRON SULFIDE)
from SPARTA, IL

Pyrite has a vast number of forms and varieties since it is so common in the earth's crust and is found in almost every possible environment.  As a polymorph of marcasite it can be difficult to distinguish between the two.  The flattened nodule forms are known as "Pyrite Suns" or "Pyrite Dollars".

3" x 2 3/4"

$25.00
PYROMORPHITE
(LEAD CHLOROPHOSPHATE)
from DAOPING MINE, GUANGXI PROV., CHINA

Occurs in the oxidation zone of lead deposits.

1 3/8"  x 1 1/4"

$35.00
PYROPHYLLITE
(ALUMINUM SILICATE HYDROXIDE)
from CHAMPION SPARKPLUG MINE, WHITE MT., CALIF.
(ROYAL C. GOULD COLLECTION)

Occurs in beds or on joints in schists, also in ore mineral veins.  Feels greasy.

3 3/4" x 2"

$35.00
RHODOCROSITE w/PYRITE
(MANGANESE CARBONATE)
from CHINA

Occurs in vein deposits in stocks and layered sedimentary rocks.  Associated with copper, silver, lead sulfides and other manganese minerals in medium-temperature hydrothermal veins.

1 5/8" x 3/4"

$25.00
ROSASITE
(COPPER ZINC CARBONATE HYDROXIDE)
from MAPIMI, MEXICO

A secondary mineral found in the oxidation zone of zinc-copper-lead deposits associated with other copper carbonates.

1 1/2" x 2"

SOLD
ROSASITE
(COPPER ZINC CARBONATE HYDROXIDE)
from SILVER BELL MINE, GLEESON, AZ

A secondary mineral found in the oxidation zone of zinc-copper-lead deposits associated with other copper carbonates.

3 1/4" x 1 1/2"

$25.00
ROSASITE w/CALCITE
(COPPER ZINC CARBONATE HYDROXIDE)
from MAPIMI, MEXICO

A secondary mineral found in the oxidation zone of zinc-copper-lead deposits associated with other copper carbonates.

2 1/4" x 1 1/2"

$30.00
GREEN SELENITE
(HYDRATED CALCIUM SULFATE)
from AUSTRALIA

Alternate name for GYPSUM.  A typical sedimentary evaporate mineral.  Forms through direct precipiation from saline waters or through alteration of anhydrite.

5" x 4 1/2"

$60.00
ORANGE SELENITE
(HYDRATED CALCIUM SULFATE)
from MT. GUNSON,
 SO.  AUSTRALIA

Alternate name for GYPSUM.
 A typical sedimentary evaporate mineral.  Forms through direct precipiation from saline waters or through alteration of anhydrite.

7 1/2" x 3 3/4"

$60.00
SODALITE
(SODIUM ALUMINUM SILICATE CHLORIDE)
from BRAZIL

Sodalite is a scarce mineral that can be rock forming and classified as a feldspathoid.  It is found in silica poor rocks containing other silica poor minerals and no quart.

6" x 4"

$45.00
RED SPINEL
(MAGNESIUM ALUMINUM OXIDE)
from AN PHU MARBLE MINE, LUC YEN DISTRICT, YEN BAI PROV., VIET NAM

Spinel and Ruby are chemically similare, but spinel typically forms in well formed octahedrons.  Occurs in carbonate rocks, igneous rocks, schists, placers.

3 3/4" x 2"

$40.00