Rock Identifier

Category

Gemstone

Browse gemstone specimens identified by the Rock Identifier community.

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)) — mineral

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Aquamarine (Beryl (Be3Al2Si6O18 with iron traces)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18 with iron traces)

Yellow Quartz (Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Garnet Schist (Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)) — metamorphic

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Prehnite (Prehnite (Ca2Al2Si3O10(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Ruby (Corundum (Al2O3 with Chromium impurities)) — mineral

Ruby

Corundum (Al2O3 with Chromium impurities)

Chert (often called Flint or Jasper) (Cryptocrystalline quartz (SiO2)) — sedimentary

Chert (often called Flint or Jasper)

Cryptocrystalline quartz (SiO2)

Epidote (Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))) — metamorphic

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Picture Jasper (Silicon Dioxide (SiO2)) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2)

Amazonite (Potassium Feldspar (Microcline) - K(AlSi3O8)) — mineral

Amazonite

Potassium Feldspar (Microcline) - K(AlSi3O8)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Banded Agate (specifically Botryoidal/Orbicular Agate) (Silicon Dioxide (SiO2)) — Mineral (variety of Chalcedony/Quartz)

Banded Agate (specifically Botryoidal/Orbicular Agate)

Silicon Dioxide (SiO2)

Mineral (variety of Chalcedony/Quartz)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

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

Fluorite (Rainbow Fluorite) (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite (Rainbow Fluorite)

Fluorite (Calcium Fluoride, CaF2)

Carnelian (Carnelian (Silicon Dioxide - SiO2 with iron oxide impurities)) — mineral

Carnelian

Carnelian (Silicon Dioxide - SiO2 with iron oxide impurities)

Watermelon Tourmaline (Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH) — mineral

Watermelon Tourmaline

Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Yellow Quartz (Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Amethyst (SiO2 (Silicon Dioxide with iron impurities)) — mineral

Amethyst

SiO2 (Silicon Dioxide with iron impurities)

Milky Quartz (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Agate (Polished Nodule) (Agate (Silicon Dioxide, SiO2)) — mineral

Agate (Polished Nodule)

Agate (Silicon Dioxide, SiO2)

Quartz Vein / Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Chert (White Chert or Flint) (Microcrystalline or cryptocrystalline quartz (SiO2)) — sedimentary

Chert (White Chert or Flint)

Microcrystalline or cryptocrystalline quartz (SiO2)

Massive Quartz (Yellow/Citrine variety) (Silicon Dioxide (SiO2)) — mineral

Massive Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

Carnelian (Carnelian (a variety of Chalcedony, SiO2)) — Mineral

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of iron oxide)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of iron oxide)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Basalt (Basalt (extrusive volcanic rock)) — igneous

Basalt

Basalt (extrusive volcanic rock)

Smoky Quartz (Quartz (Silicon Dioxide) - SiO2) — mineral

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

Sodalite (Sodalite (Na8Al6Si6O24Cl2)) — mineral

Sodalite

Sodalite (Na8Al6Si6O24Cl2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Rose Quartz (Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)) — mineral

Rose Quartz

Silicon Dioxide with traces of Titanium, Iron, or Manganese (SiO2)

Chert (often called Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline Quartz (SiO2)

White Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)