Rock Identifier

Category

Organic Gem Material (Botanical)

Browse organic gem material (botanical) specimens identified by the Rock Identifier community.

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Granodiorite / Granite (Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)) — igneous

Granodiorite / Granite

Granodiorite (containing Quartz SiO2, Plagioclase Feldspar, and Biotite)

Jade (There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.) — Mineral

Jade

There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.

Diopside (likely Chromian Diopside) (Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.) — mineral

Diopside (likely Chromian Diopside)

Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.

Carnelian (Chalcedony (cryptocrystalline quartz), SiO2) — Mineral

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Amber (Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O) — Organic mineraloid

Amber

Succinite (a Fossilized Tree Resin); Chemical formula is approximately C10H16O

Organic mineraloid

Ferruginous Sandstone (Ironstone) (Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)) — sedimentary

Ferruginous Sandstone (Ironstone)

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Ametrine (SiO2 (silicon dioxide)) — Mineral

Ametrine

SiO2 (silicon dioxide)

Lava Rock (Basalt) (Basalt (extrusive igneous rock)) — igneous

Lava Rock (Basalt)

Basalt (extrusive igneous rock)

Tourmaline (likely Schorl) (Tourmaline Group Mineral (e.g., Schorl for black varieties); (Na,Ca)(Li,Mg,Fe,Mn,Al)3Al6(BO3)3Si6O18(OH)4) — Mineral

Tourmaline (likely Schorl)

Tourmaline Group Mineral (e.g., Schorl for black varieties); (Na,Ca)(Li,Mg,Fe,Mn,Al)3Al6(BO3)3Si6O18(OH)4

Jade (Jadeite or Nephrite) — Mineral/Mineraloid

Jade

Jadeite or Nephrite

Mineral/Mineraloid

Carborundum (Silicon Carbide) (Silicon Carbide (SiC)) — mineral (synthetic)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

mineral (synthetic)

Beach Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Beach Quartzite Pebble

Quartzite (primarily SiO2)

Anthracite Coal (Anthracite (Carbon-rich metamorphic coal)) — metamorphic

Anthracite Coal

Anthracite (Carbon-rich metamorphic coal)

Bauxite (Bauxite (Al(OH)3, AlO(OH))) — sedimentary

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Chert / Flint (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Fossiliferous Brachiopod in Shale (Brachiopoda (Phylum) preserved in Carbonaceous Shale) — sedimentary

Fossiliferous Brachiopod in Shale

Brachiopoda (Phylum) preserved in Carbonaceous Shale

Fluorite with Rhodochrosite (Fluorite (CaF2) and Rhodochrosite (MnCO3)) — Mineral

Fluorite with Rhodochrosite

Fluorite (CaF2) and Rhodochrosite (MnCO3)

Amethyst (SiO2 (Silicon Dioxide) - a variety of Quartz) — Mineral

Amethyst

SiO2 (Silicon Dioxide) - a variety of Quartz

Chert / Flint (Microcrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Microcrystalline Quartz (SiO2)

Pyrite (Pyrite (Iron sulfide, FeS₂)) — Mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

Chert (Jasper/Mudstone) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper/Mudstone)

Silicon Dioxide (SiO2)

Chert (Jasper variety) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Chert (Tan/Buff Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Tan/Buff Chert)

Microcrystalline Quartz (SiO2)

Sandstone Concretion (Clastic sedimentary rock (primarily Quartz SiO2)) — sedimentary

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Chert (Green variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Green variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Chert (specifically Flint or Gray Chert) (Silicon Dioxide (Microcrystalline Quartz), SiO2) — sedimentary

Chert (specifically Flint or Gray Chert)

Silicon Dioxide (Microcrystalline Quartz), SiO2

Chert Pebble (with Quartz Vein) (Chert (Cryptocrystalline Silica - SiO2)) — sedimentary

Chert Pebble (with Quartz Vein)

Chert (Cryptocrystalline Silica - SiO2)

Chert (vuggy variety) (Microcrystalline silica (SiO2)) — sedimentary

Chert (vuggy variety)

Microcrystalline silica (SiO2)

Chert (Flint) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline Quartz, SiO2)

Chert (Smooth River Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Silicon Dioxide (SiO2)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Chert (Jasper/Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Agate variety)

Microcrystalline Quartz (SiO2)

Green Sandstone (Glauconitic Sandstone) — sedimentary

Green Sandstone

Glauconitic Sandstone

Chert (variant Flint) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variant Flint)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Quartzite River Pebble (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite River Pebble

Metamorphosed Quartz Sandstone (SiO2)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (primarily Quartz, SiO2)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (primarily Quartz, SiO2)

Sandstone (likely Quartzose) (Sandstone (Principally SiO2)) — sedimentary

Sandstone (likely Quartzose)

Sandstone (Principally SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite