Green Fluorite rock specimen

Green Fluorite

Calcium Fluoride (CaF2)

mineral

Goldstone rock specimen

Goldstone

Aventurine Glass (Man-made)

mineral

Blue Dyed Agate rock specimen

Blue Dyed Agate

Chalcedony (SiO2) with artificial pigment

mineral

Purple Banded Agate rock specimen

Purple Banded Agate

Cryptocrystalline Quartz (SiO2)

mineral

Malachite rock specimen

Malachite

Malachite (Copper Carbonate Hydroxide, Cu2CO3(OH)2)

mineral

Fluorite Octahedron rock specimen

Fluorite Octahedron

Fluorite (Calcium Fluoride, CaF2)

mineral

Granite rock specimen

Granite

Granite (compositionally: Quartz, Feldspar, Mica)

igneous

Granite and Igneous Mix rock specimen

Granite and Igneous Mix

Phaneritic Felsic to Mafic Intrusive Rocks

igneous

Quartzite rock specimen

Quartzite

Quartzite (SiO2)

metamorphic

Basalt rock specimen

Basalt

Basalt (composition mainly of Plagioclase feldspar, Pyroxene, and Olivine)

igneous

Granite rock specimen

Granite

Granite (Phaneritic Quartz-Feldspar rock)

igneous

Labradorite rock specimen

Labradorite

Labradorite (Ca,Na)(Al,Si)4O8

mineral

Ruby rock specimen

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

mineral

Beryl (var. Heliodor or Aquamarine) rock specimen

Beryl (var. Heliodor or Aquamarine)

Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)

mineral

Banded Chert rock specimen

Banded Chert

Cryptocrystalline Quartz (SiO2)

sedimentary

Sandstone (Ferruginous) rock specimen

Sandstone (Ferruginous)

Sandstone (Clastic sedimentary rock, predominantly SiO2 with Fe2O3 cement)

sedimentary

Blue Sapphire rock specimen

Blue Sapphire

Corundum (Al2O3)

mineral

Sandstone rock specimen

Sandstone

Arenite

sedimentary

Yellow Calcite rock specimen

Yellow Calcite

Calcite (Calcium Carbonate, CaCO3)

mineral

Clear Quartz rock specimen

Clear Quartz

Silicon Dioxide (SiO2)

mineral

Brachiopod Fossil in Limestone rock specimen

Brachiopod Fossil in Limestone

Phylum Brachiopoda, Class Rhynchonellata

sedimentary

Pink Quartzite rock specimen

Pink Quartzite

Quartzite (SiO2 with iron oxide impurities)

metamorphic

Lapis Lazuli rock specimen

Lapis Lazuli

Lapis Lazuli (Complex silicate mixture)

metamorphic

Fossilized Shark Tooth (Basal Bone) rock specimen

Fossilized Shark Tooth (Basal Bone)

Otodus sp. (Mineralized Hydroxyapatite)

sedimentary

Crinoid Fossil Stem Segment rock specimen

Crinoid Fossil Stem Segment

Class Crinoidea (Echinodermata)

sedimentary

Green Aventurine rock specimen

Green Aventurine

Silicon Dioxide (SiO2) with inclusions

metamorphic

Red Jasper rock specimen

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

sedimentary

Amazonite rock specimen

Amazonite

KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)

mineral

Amethyst or Smoky Quartz Geode Slice rock specimen

Amethyst or Smoky Quartz Geode Slice

Crystalline Silicon Dioxide (SiO2) with iron impurities

mineral

Smoky Quartz Geode Cluster rock specimen

Smoky Quartz Geode Cluster

Silicon Dioxide (SiO2)

mineral

Milky Quartz rock specimen

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral

Ferruginous Sandstone rock specimen

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

sedimentary

Shale (or Mudstone) rock specimen

Shale (or Mudstone)

Siltstone/Argillite (composed mainly of clay and silt-sized particles)

sedimentary

Diamond rock specimen

Diamond

Native Carbon (C)

mineral

Rose Quartz rock specimen

Rose Quartz

Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese

mineral

Diamond rock specimen

Diamond

Diamond (Pure Carbon - C)

mineral

Diamond rock specimen

Diamond

Carbon (C)

mineral

Gold Nugget Jewelry rock specimen

Gold Nugget Jewelry

Native Gold (Au)

mineral

Gold rock specimen

Gold

Gold (Au)

mineral

Gold rock specimen

Gold

Gold (Native Au)

mineral

Gold Nugget rock specimen

Gold Nugget

Native Gold (Au)

mineral

Anthracite Coal rock specimen

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

metamorphic