Rock Identifier

Category

Mineral (Gemstone)

Browse mineral (gemstone) specimens identified by the Rock Identifier community.

Garnet (Almandine/Pyrope variety) (Silicate mineral group; typically Fe3Al2(SiO4)3 (Almandine) or Mg3Al2(SiO4)3 (Pyrope)) — mineral

Garnet (Almandine/Pyrope variety)

Silicate mineral group; typically Fe3Al2(SiO4)3 (Almandine) or Mg3Al2(SiO4)3 (Pyrope)

Amazonite (Amazonite (KAlSi3O8) - a variety of Microcline Feldspar) — Mineral

Amazonite

Amazonite (KAlSi3O8) - a variety of Microcline Feldspar

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)

Smoky Quartz on Matrix (Silicon Dioxide (SiO2) with trace impurities and aluminum inclusions) — mineral

Smoky Quartz on Matrix

Silicon Dioxide (SiO2) with trace impurities and aluminum inclusions

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Red Jasper (Opaque Chalcedony) (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — mineral

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Amazonite (Amazonite (KAlSi3O8 - a variety of Microcline Feldspar)) — Mineral

Amazonite

Amazonite (KAlSi3O8 - a variety of Microcline Feldspar)

Amethyst (Amethyst (Silicon Dioxide with Iron impurities), SiO2) — mineral

Amethyst

Amethyst (Silicon Dioxide with Iron impurities), SiO2

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

Amethyst (Geode)

Silicon Dioxide (SiO2) with iron impurities

Garnet (specifically Almandine) (Almandine (Fe3Al2(SiO4)3)) — mineral

Garnet (specifically Almandine)

Almandine (Fe3Al2(SiO4)3)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Quartz (Raw Chunk) (Silicon Dioxide (SiO2)) — mineral

Quartz (Raw Chunk)

Silicon Dioxide (SiO2)

Moonstone (Adularia (Potassium Aluminum Silicate, KAlSi3O8)) — mineral

Moonstone

Adularia (Potassium Aluminum Silicate, KAlSi3O8)

Olivine (Peridot) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Ruby (Corundum (Al2O3 with Chromium)) — mineral

Ruby

Corundum (Al2O3 with Chromium)

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

Amethyst

Silicon Dioxide with Iron impurities (SiO2)

Amethyst (Amethyst (SiO2 - Silicon Dioxide with Iron impurities)) — mineral

Amethyst

Amethyst (SiO2 - Silicon Dioxide with Iron impurities)

Pearl (Calcium Carbonate (CaCO3) with Conchiolin) — mineral

Pearl

Calcium Carbonate (CaCO3) with Conchiolin

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Turquoise (CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Olivine (Peridotite) ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — igneous

Olivine (Peridotite)

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Citrine (Quartz (SiO2) - variety Citrine) — Mineral

Citrine

Quartz (SiO2) - variety Citrine

Red Jasper (Jasper (Silicon Dioxide) - SiO2) — sedimentary/mineral

Red Jasper

Jasper (Silicon Dioxide) - SiO2

sedimentary/mineral

Amethyst (SiO2 (Silicon Dioxide)) — Mineral

Amethyst

SiO2 (Silicon Dioxide)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia) (Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy) — Mineral (synthetic) and Metal (precious/base)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Mineral (synthetic) and Metal (precious/base)

Fluorite and Red Jasper (Fluorite (Calcium Fluoride, CaF2) and Red Jasper (Silicon Dioxide, SiO2)) — mineral

Fluorite and Red Jasper

Fluorite (Calcium Fluoride, CaF2) and Red Jasper (Silicon Dioxide, SiO2)

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

Rough Quartz

Quartz (Silicon Dioxide, SiO2)

Chalcedony (specifically Agate or Carnelian pebble) (Chalcedony (Microcrystalline Quartz, SiO2)) — mineral

Chalcedony (specifically Agate or Carnelian pebble)

Chalcedony (Microcrystalline Quartz, SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Banded Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Cryptocrystalline Quartz (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Almandine Garnet (Almandine (Fe3Al2Si3O12)) — mineral

Almandine Garnet

Almandine (Fe3Al2Si3O12)

Blue Chalcedony (Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)) — mineral

Blue Chalcedony

Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Schist (Garnet-Mica Schist) (Garnet-Mica Schist) — metamorphic

Schist (Garnet-Mica Schist)

Garnet-Mica Schist

Nephrite Jade (Nephrite) — Mineral/Rock

Nephrite Jade

Nephrite

Amber (Fossilized Tree Resin (Generic formula roughly C10H16O)) — mineral

Amber

Fossilized Tree Resin (Generic formula roughly C10H16O)