The Dye Clan

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Amethyst

Amethyst

2.5" x 1.25"Purchase Price: $4.00Amethyst is a purple variety of quartz (SiO2) and owes its color to irradiation, iron impurities, and the presence of trace elements. The name in ancient Greek means "not intoxicated". Amethyst is the birthstone for February.
Ammonite

Ammonite

1.5" x 1.25"Purchase Price: UnknownAmmonites are extinct marine invertebrates. They first appeared in the Late Silurian to Early Devonian period (around 400 million years ago) and became extinct at the end of the Cretaceous period (65 million years ago).
Ammonite - Perisphinctes sp

Ammonite - Perisphinctes sp

2.5" x 2.25"Purchase Price: $10.00Perisphinctes is an extinct genus of ammonite cephalopod also known as a larger version of a snail. They lived during the Jurassic Period (200-146 million years ago) and serve as an index fossil for that time period.
Andesite

Andesite

4" x 4"Purchase Price: NAAndesite is an extrusive igneous, volcanic rock of intermediate composition (52-63% SiO2). This sample is porphyritic, which means that at least one group of crystals is obviously larger than another group.
Aragonite

Aragonite

1.5" x 1.25" x 1"Purchase Price: $2.95Aragonite is a crystal form of calcium carbonate (CaCO3). It will change to calcite at 380-470°C. Its crystal shape is an orthorhombic system with acicular crystals. Repeated twinning results in pseudo-hexagonal forms.
Bismuth

Bismuth

1.5" x 1" x 1"Purchase Price: $10.00Bismuth is a brittle metal with a white, silver-pink hue. The bright colors are from an iridescent oxide tarnish. Bismuth is naturally diamagnetic, meaning it repels magnets.
Carborundum

Carborundum

4" x 2.5" x 2"Purchase Price: $8.00Silicon carbide (SiC), also known as carborundum. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics which are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests.
Cave Popcorn (Coralloids)

Cave Popcorn (Coralloids)

4" x 2.5" x 2"Purchase Price: NAThese commonly-seen structures form principally in subaerial cave settings by mineral precipitation as water seeps by capillary action from cave walls or from dripstone or flowstone.
Chalcopyrite (Peacock Ore)

Chalcopyrite (Peacock Ore)

1.75" x 1.25" x 1"Purchase Price: $0.75Chalcopyrite is a copper iron sulfide mineral (CuFeS2). From Greek chalkos "copper", and pyrites "fire". The irridescent blues, greens, yellows, and purples are tarnish.
Chalcopyrite (Peacock Ore)

Chalcopyrite (Peacock Ore)

1.75" x 1.25" x 1"Purchase Price: $0.75Chalcopyrite is a copper iron sulfide mineral (CuFeS2). From Greek chalkos "copper", and pyrites "fire". The irridescent blues, greens, yellows, and purples are tarnish.
Citrine

Citrine

4" x 3"Purchase Price: $8.00Citrine is a yellow to golden-brown variety of quartz, with a hardness of 7 on Moh's Scale. Citrine's golden, amber color is caused by heat interacting with Amethyst in the depths of the earth. At times, Citrine is created by the artificial heating of Amethyst, which changes from purple to gold at 878°F.
Coal

Coal

2.25" x 1.5"Purchase Price: NACoal is an organic sedimentary rock that forms mainly from plant debris. Coal is combustible and is often mined for use as a fuel.
Conglomerate

Conglomerate

3.5" x 2" x 1.5"Purchase Price: NAConglomerate is a clastic sedimentary rock that contains large (greater than 2 mm) rounded particles. The space between the pebbles is generally filled with smaller particles and/or a chemical cement that binds the rock together.
Coquina

Coquina

7" x 4" x 3"Purchase Price: NACoquina is a sedimentary rock that is composed largely of the transported, abraded, and mechanically sorted fragments of either mollusks, trilobites, brachiopods, or other invertebrates.
Dalmatian Stone (Jasper)

Dalmatian Stone (Jasper)

0.75" x 0.5"Purchase Price: UnknownJasper, an impure variety of silica, is an opaque rock of virtually any color stemming from the mineral content of the original sediments or ash. Patterns arise during the consolidation process.
Fluorite Crystal

Fluorite Crystal

0.75" x 0.5" x 0.5"Purchase Price: $0.35Fluorite is a halide mineral composed of calcium fluoride, CaF2. Many samples of fluorite exhibit flourescence under ultraviolet light, a property that takes its name from fluorite. It has a defining Mohs hardness of 4.
Fluorite Crystal

Fluorite Crystal

0.75" x 0.5" x 0.5"Purchase Price: $0.35Fluorite is a halide mineral composed of calcium fluoride, CaF2. Many samples of fluorite exhibit flourescence under ultraviolet light, a property that takes its name from fluorite. It has a defining Mohs hardness of 4.
Garnet

Garnet

1" x 1" x 1"Purchase Price: $11.97Garnet species are found in many colors and generally fit into one of 6 species. The general chemical formula is X3Y2(SiO4)3. Garnets have a cubic crystal system, and this specimen is a rhombic dodecahedron. Notice that each of the 12 faces is a rhombus and that garnet has a square cross section in one direction and a hexagonal cross section in the other directions.
Geode

Geode

2.5" x 2"Purchase Price: NAAfter rock around the cavity hardens, dissolved silicates and/or carbonates are deposited on the inside surface. Over time, this slow feed of mineral constituents from groundwater or hydrothermal solutions allows crystals to form inside the hollow chamber.
Geode (Sugar Bomb)

Geode (Sugar Bomb)

4" x 2.5"Purchase Price: $4.00After rock around the cavity hardens, dissolved silicates and/or carbonates are deposited on the inside surface. Over time, this slow feed of mineral constituents from groundwater or hydrothermal solutions allows crystals to form inside the hollow chamber.
Gneiss

Gneiss

Purchase Price: NAGneiss is a common and widely distributed foliated metamorphic rock that has a banded appearance and is made up of granular mineral grains. It is formed at great depths below the earth's surface from formations that were originally either igneous or sedimentary.
Gypsum

Gypsum

3" x 2.25"Purchase Price: NAGypsum (CaSO4·2H2O) is a very soft sulfate mineral. It is the main constituent in gypsum board (sheetrock) and is also used in fertilizer. The word gypsum is derived from the Greek gypsos, "chalk" or "plaster". It has a defining Mohs hardness of 2.
Gypsum, Desert Rose

Gypsum, Desert Rose

1" x 1" x 1"Purchase Price: $0.50The rosette crystal habit tends to occur when the crystals form in arid sandy conditions, such as the evaporation of a shallow salt basin.
Gypsum, Desert Rose

Gypsum, Desert Rose

9" x 5" x 3"Purchase Price: $7.50The rosette crystal habit tends to occur when the crystals form in arid sandy conditions, such as the evaporation of a shallow salt basin.
Gypsum, Satin Spar

Gypsum, Satin Spar

1" x 1" x 1"Purchase Price: UnknownSatin spar is a crystalline mineral variety of gypsum. The crystals are most often silky, fibrous, and translucent (pearly, milky).
Gypsum, Satin Spar

Gypsum, Satin Spar

5" x 2"Purchase Price: UnknownSatin spar is a crystalline mineral variety of gypsum. The crystals are most often silky, fibrous, and translucent (pearly, milky).
Gypsum, Selenite

Gypsum, Selenite

8" x 3.5" x 0.5"Purchase Price: $3.00Selenite is a crystalline mineral variety of gypsum (CaSO4·2H2O). The crystals form in mica-like sheets that sometimes appear like columns.
Horn Coral

Horn Coral

2.5" x 2" x 1.5"Purchase Price: NAI found this fossil coral when hiking near Kelly's Grove.
Horn Coral

Horn Coral

6" x 2.5" x 2"Purchase Price: NAI found this fossil coral when hiking near Kelly's Grove.
Iron Pyrite (Fools Gold)

Iron Pyrite (Fools Gold)

2" x 1.5" x 1"Purchase Price: NAPyrite is an iron sulfide with the formula FeS2. The name pyrite is from the Greek word meaning "fire". Pyrite creates sparks when struck against steel. It is nicknamed fool's gold because of its resemblance to gold.
Iron Pyrite (Fools Gold)

Iron Pyrite (Fools Gold)

4" x 2.5"Purchase Price: $14.95Pyrite is an iron sulfide with the formula FeS2. The name pyrite is from the Greek word meaning "fire". Pyrite creates sparks when struck against steel. It is nicknamed fool's gold because of its resemblance to gold.
Knightia eocaena

Knightia eocaena

5.25" x 4"Purchase Price: $18.47A 50 million year old, Eocene-Era fossil fish. It is the state fossil of Wyoming and the most commonly excavated fossil fish in the world.
Lepidolite (Purple Mica)

Lepidolite (Purple Mica)

1.75" x 1.5" x 1.5"Purchase Price: $2.95Lepidolite (KLi2Al(Al,Si)3O10(F,OH)2) is a lilac-gray member of the mica group. Named after the greek lepidos meaning "scale", in reference to the scaly flakes. It is a major source of lithium, the world's lightest metal, which is used in batteries and other applications.
Limestone

Limestone

Purchase Price: NALimestone is a rock that is composed primarily of calcium carbonate. It can form organically from the accumulation of shell, coral, algal and fecal debris. It can also form from the precipitation of calcium carbonate from lake or ocean water.
Milky Quartz

Milky Quartz

Purchase Price: NAMilky quartz may be the most common variety of crystalline quartz and can be found almost anywhere. The white color may be caused by minute fluid inclusions of gas, liquid, or both, trapped during the crystal formation. The cloudiness caused by the inclusions effectively bars its use in most optical and quality gemstone applications. Milky quartz is widely used as a decorative landscaping material by gardeners.
Moqui Marble

Moqui Marble

1" x 1" x 1"Purchase Price: NAThe iron oxide concretions consist of sandstone cemented together by hematite (Fe2O3), and goethite (FeOOH). They were created by the precipitation of iron, which was dissolved in groundwater.
Muscovite Mica

Muscovite Mica

2" x 1.5" x 0.25"Purchase Price: UnknownMuscovite is the most common mica. It has a highly-perfect basal cleavage yielding remarkably-thin sheets which are often highly elastic.
Obsidian

Obsidian

2" x 1.5" x 1"Purchase Price: NAPure obsidian is usually dark in appearance, though the color varies depending on the presence of impurities. Iron and magnesium typically give the obsidian a dark brown to black color.
Optical Calcite

Optical Calcite

1.5" x 1.25" x 0.75"Purchase Price: UnknownCalcite is the most stable polymorph of calcium carbonate (CaCO3). It has a defining Mohs hardness of 3. Calcite crystals are rhombohedral. They display an optical property called birefringence, in which light is polarized and split into two paths. This results in a double image when viewed through the crystal.
Orthoceras

Orthoceras

8" x 6"Purchase Price: $7.00Orthoceras fossils are dated back to the Silurian Age 400 + million years ago and are the earliest recognizable animals. They are ancestors to the modern day squid. The name means straight horn.
Pecopteris

Pecopteris

3" x 1.5"Purchase Price: $1.00Geologic age is Middle Pennsylvanian 299-318 million years old. Francis Creek Shale. Plants bearing these leaves went extinct around the beginning of the Permian period.
Petrified Wood

Petrified Wood

6" x 4" x 3"Purchase Price: NAThe petrifaction process occurs underground, when wood becomes buried under sediment and is initially preserved due to a lack of oxygen which inhibits aerobic decomposition. Mineral-laden water flowing through the sediment deposits minerals in the plant's cells; as the plant's lignin and cellulose decay, a stone mold forms in its place.
Planolites

Planolites

5" x 3" x 1"Purchase Price: NAAge: Precambrian to recent. These burrows, which may reach a width of 5/8", were made by wormlike animals that ate sediment as they burrowed. Planolites is one of the oldest of all fossils.
Planolites

Planolites

3" x 2"Purchase Price: NAAge: Precambrian to recent. These burrows, which may reach a width of 5/8", were made by wormlike animals that ate sediment as they burrowed. Planolites is one of the oldest of all fossils.
Pumice

Pumice

3" x 2" x 2"Purchase Price: NAPumice is a textural term for a volcanic rock that is a solidified frothy lava typically created when super-heated, highly pressurized rock is violently ejected from a volcano.
Pyrite Disk

Pyrite Disk

3" x 3" x 0.25"Purchase Price: $8.98
Quartz

Quartz

2" x 2" x 2"Purchase Price: NAQuartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. It has a defining Mohs hardness of 7.
Quartz Crystal

Quartz Crystal

2" x 0.75" x 0.75"Purchase Price: UnknownQuartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. It has a defining Mohs hardness of 7.
Quartz Crystal

Quartz Crystal

2" x 2" x 2"Purchase Price: UnknownQuartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. It has a defining Mohs hardness of 7.
Quartz Crystal

Quartz Crystal

4" x 3" x 1"Purchase Price: $5.00Quartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. It has a defining Mohs hardness of 7.
Quartz Monzonite

Quartz Monzonite

2.5" x 1.5" x 1.5"Purchase Price: NAQuartz monzonite is an intrusive igneous rock. Granite contains more than 20% quartz while quartz monzonite contains only 5-20%. The mineral crystals are quartz (clear), feldspar (white), and biotite (black).
Quartzite

Quartzite

2.5" x 1.5" x 0.5"Purchase Price: NAQuartzite is a non-foliated metamorphic rock that is produced by the metamorphism of sandstone. It is composed primarily of quartz.
Rhyolitic Tuff

Rhyolitic Tuff

3" x 2" x 0.5"Purchase Price: NATuff is a type of rock consisting of consolidated volcanic ash. Each layer represents a separate eruption that covered everything around with hot ash, dust, and small bits of rock and molten lava.
Rose Quartz

Rose Quartz

4" x 2" x 2"Purchase Price: $4.00Rose quartz is a type of quartz that exhibits a pale pink to rose red hue. The color is usually due to trace amounts of titanium, iron, or manganese in the massive material.
Sandstone

Sandstone

4" x 4" x 0.5"Purchase Price: NASandstone is a clastic sedimentary rock made up mainly of sand-size (1/16 to 2 mm) weathering debris. Environments where large amounts of sand can accumulate include beaches, deserts, flood plains, and deltas.
Schist

Schist

6" x 4" x 0.5"Purchase Price: NASchists constitute a group of medium-grade (between phyllite and gneiss) metamorphic rocks with more than 50% platy and elongated minerals such as micas, chlorite, graphite, and others. Most schists have been derived from clays and muds.
Scoria

Scoria

5" x 3.5" x 2"Purchase Price: NAScoria is a volcanic rock containing many holes or vesicles, which form when gases that were dissolved in the magma come out of solution as it erupts. Scoria is most often dark in color and basaltic or andesitic in composition.
Septarian Nodule

Septarian Nodule

3" x 3"Purchase Price: $8.00Septarian nodules are concretions containing angular cavities or cracks. Latin word septum means "partition". The yellow centers are calcite, the brown lines are aragonite, and the outer grey rock is limestone. Formed when bentonite clay balls dried and cracked then the ocean returned and deposited calcite in the cracks.
Shale

Shale

4" x 3" x 0.25"Purchase Price: NAShale is a clastic sedimentary rock that is made up of clay-size (less than 1/256 mm) weathering debris. It typically breaks into thin flat pieces.
Siltstone

Siltstone

Purchase Price: NASiltstone is a clastic sedimentary rock that forms from silt-size (between 1/256 and 1/16 mm) weathering debris. Stratification is likely to be obscure and tends to weather at oblique angles unrelated to bedding.
Slate

Slate

Purchase Price: NASlate is a foliated metamorphic rock that is formed through the metamorphism of shale. It is a low grade metamorphic rock that splits into thin pieces. Slate is frequently gray in color.
Snakeskin Agate

Snakeskin Agate

2" x 1" x 1"Purchase Price: UnknownAgate is a microcrystalline variety of silica, cheifly chalcedony, with multi-colored curved or angular banding. Snakeskin agate is named because of the unusual surface pattern.
Snowflake Obsidian

Snowflake Obsidian

2" x 1.5" x 1"Purchase Price: NAObsidian consists mainly of SiO2. In some stones, the inclusion of small, white, radially clustered crystals of cristobalite in the black glass produce a blotchy or snowflake pattern (snowflake obsidian).
Soapstone

Soapstone

6" x 2" x 2"Purchase Price: $4.00Soapstone is a metamorphic rock, a talc-schist. It is largely composed of the mineral talc, which has a Mohs hardness of 1. It has been a medium of carving for thousands of years.
Stalagtite

Stalagtite

14" x 3"Purchase Price: $0.25Water containing carbon dioxide dissolves calcium carbonate from limestone, forming a calcium bicarbonate solution in underground caverns. This solution travels through the rock until it comes into contact with air. A chemical reaction takes place, and particles of calcium carbonate are deposited.
Sulfur

Sulfur

6" x 6" x 3"Purchase Price: $0.75Sulfur is a chemical element with symbol S and atomic number 16. Elemental sulfur is a bright yellow. Octasulfur (S8) is a soft yellow solid with only a faint odor, similar to matches. Sulfur is very flamable and burns with a blue flame.
Sulfur

Sulfur

3" x 2" x 2"Purchase Price: $9.00
Sunstone

Sunstone

0.25" x 0.25" x 0.25"Purchase Price: NASunstone is a transparent, yellowish labradorite (a plagioclase feldspar mineral). It is the official gemstone of Oregon.
Thunderegg

Thunderegg

2" x 2"Purchase Price: UnknownThunderegg is not synonymous with either geode or agate. A geode is a simple term for a rock with a hollow in it, often with crystal growth. A thunderegg on the other hand is a specific geological structure. The egg is composed of two distinct parts, the matrix or rind (the outer part) and the agate center which is usually called the lens or the window.
Titanium-coated Quartz

Titanium-coated Quartz

1" x 1"Purchase Price: $10.00This is a natural Arkansas quartz crystal bonded with titanium to give it a metallic rainbow shimmer.
Topaz

Topaz

0.25" x 0.25"Purchase Price: NATopaz is a silicate mineral of aluminum and fluorine with the chemical formula Al2SiO4. Pure topaz is colorless and transparent, but it is usually tinted by impurities. Orange topaz is the birthstone of November and the state gemstone of Utah. It has a defining Mohs hardness of 8.
Tourmaline (Schorl) on Quartz Matrix

Tourmaline (Schorl) on Quartz Matrix

3" x 2" x 2"Purchase Price: $6.00Tourmaline is a semi-precious stone that is most often black but can also be brown, violet, green, or pink. It is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. It is 1-7.5 on Mohs hardness scale.
Trilobite - Calymene

Trilobite - Calymene

3" x 2"Purchase Price: $2.00Geologic age is Ordovician, 488-443 million years old. This trilobite grew to a length of 2.5 inches and fed on small edible particles in the water.
Trilobite - Cambropallas Telesto

Trilobite - Cambropallas Telesto

8" x 6"Purchase Price: $25.00Cambropallas Telesto trilobites are known to have inhabited the earth during the Cambrian Period 500 million years ago and are among some of the earliest trilobites to appear in the fossil record. They have well developed genal spines and clearly segmented glabella.
Ulexite

Ulexite

1.5" x 1" x 0.5"Purchase Price: $5.00 (NaCaB5O6(OH)6·5(H2O))
Unknown Fossil Coral

Unknown Fossil Coral

3" x 2"Purchase Price: NAI found this fossil coral when hiking near Kelly's Grove.
Willemite and Calcite

Willemite and Calcite

2" x 2"Purchase Price: $6.80Willemite is a zinc silicate mineral (Zn2SiO4). It is highly fluorescent (green) under shortwave ultraviolet light. Calcite (CaCO3) glows red.