Vesicular Basalt rock specimen

Vesicular Basalt

Extrusive Basalt (Mafic Silicate)

igneous

Quartz Geode rock specimen

Quartz Geode

Silicon Dioxide (SiO2)

mineral

Granite rock specimen

Granite

Granite (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Mica K(Mg,Fe)3AlSi3O10(OH)2)

igneous

Sandstone rock specimen

Sandstone

Arenite (composed primarily of SiO2)

sedimentary

Blue Crackle Quartz (Dyed Quarzite) rock specimen

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Metamorphic (modified)

Snowflake Obsidian rock specimen

Snowflake Obsidian

Vitreous Volcanic Glass (Siliceous Obsidian with Cristobalite inclusions)

igneous

Green Aventurine rock specimen

Green Aventurine

Aventurine Quartz (SiO2) with Fuchsite inclusions

metamorphic

Diamond in Gold Setting rock specimen

Diamond in Gold Setting

Diamond (C - pure carbon)

mineral

Pearl rock specimen

Pearl

Calcium carbonate (CaCO3) - Aragonite/Calcite variety

mineral

Pearl rock specimen

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

mineral

Tahitian Pearl rock specimen

Tahitian Pearl

Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3

mineral

Quartzite rock specimen

Quartzite

Quartzite (SiO2)

metamorphic

Ferruginous Quartz (Iron-stained Quartzite) rock specimen

Ferruginous Quartz (Iron-stained Quartzite)

Silicon Dioxide (SiO2) with iron oxide inclusions

metamorphic

Granodiorite rock specimen

Granodiorite

Granodiorite (Intermediate to Felsic Intrusive Rock)

igneous

Amethyst Geode (Thunderegg) rock specimen

Amethyst Geode (Thunderegg)

Silicon Dioxide (SiO2) - Quartz Variety: Amethyst

mineral

Milky Quartz rock specimen

Milky Quartz

Silicon Dioxide (SiO2)

mineral

Quartz (specifically Milky/Gray Quartz vein) rock specimen

Quartz (specifically Milky/Gray Quartz vein)

Silicon Dioxide (SiO2)

mineral

Granite (Pink/Red) rock specimen

Granite (Pink/Red)

Phaneritic Igneous Rock (Rich in K-Feldspar)

igneous

Coquina rock specimen

Coquina

Biogenic Limestone (Coquina)

sedimentary

Quartz (specifically Quartzite or Massive Quartz) rock specimen

Quartz (specifically Quartzite or Massive Quartz)

Silicon Dioxide (SiO2)

Mineral

Rainbow Hematite (Titanium Coated) rock specimen

Rainbow Hematite (Titanium Coated)

Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating

mineral

Amazonite rock specimen

Amazonite

Amazonite (KAlSi3O8)

mineral

Tiffany Stone rock specimen

Tiffany Stone

Fluoritized Opal Beryllium Ore (principally Bertrandite, Be4Si2O7(OH)2)

metamorphic

Quartz (Translucent/Rose variety) rock specimen

Quartz (Translucent/Rose variety)

Silicon Dioxide (SiO2)

mineral

Orthoclase Feldspar (Potassium Feldspar) rock specimen

Orthoclase Feldspar (Potassium Feldspar)

KAlSi3O8 (Potassium Aluminum Silicate)

mineral

Amethyst (Chevron Amethyst) rock specimen

Amethyst (Chevron Amethyst)

Amethystine Quartz (SiO2)

mineral

Red Jasper rock specimen

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

sedimentary

Orange Quartzite (or Salmon Quartzite) rock specimen

Orange Quartzite (or Salmon Quartzite)

Quartzite (SiO2)

metamorphic

Peach Moonstone rock specimen

Peach Moonstone

Orthoclase Feldspar (KAlSi3O8)

mineral

Lavender Quartz (appearing as beads) and Druzy Quartz rock specimen

Lavender Quartz (appearing as beads) and Druzy Quartz

Silicon Dioxide (SiO2)

mineral

Dyed Pink Quartzite (Jadeite Simulant) rock specimen

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

metamorphic

Lavender Jade and Snowy Quartz (Druzy) rock specimen

Lavender Jade and Snowy Quartz (Druzy)

NaAlSi2O6 (Jadeite) / SiO2 (Quartz)

metamorphic

Aventurine (Green) rock specimen

Aventurine (Green)

Silicon Dioxide (Quartz with inclusions of Fuchsite)

metamorphic

Aquamarine rock specimen

Aquamarine

Beryl (Be3Al2Si6O18)

mineral

Granodiorite (foreground) and Rose Quartz (background) rock specimen

Granodiorite (foreground) and Rose Quartz (background)

Granodiorite / Quartz (SiO2)

igneous

Banded Agate (specifically Botswana Agate appearance) rock specimen

Banded Agate (specifically Botswana Agate appearance)

Silicon Dioxide (SiO2)

mineral

Quartz (Milky/Crystalline variety) rock specimen

Quartz (Milky/Crystalline variety)

Silicon Dioxide (SiO2)

mineral

Ferruginous Quartz rock specimen

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with Iron Oxides

mineral

Quartzite with Iron Inclusions rock specimen

Quartzite with Iron Inclusions

Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite

metamorphic

Quartz Pebble (Water-worn) rock specimen

Quartz Pebble (Water-worn)

Silicon Dioxide (SiO2)

mineral

Quartz Pebble rock specimen

Quartz Pebble

Silicon Dioxide (SiO2)

mineral

Chert (Jasper/Flint variety) rock specimen

Chert (Jasper/Flint variety)

Microcrystalline quartz (SiO2)

sedimentary