Smoky Quartz with Amethyst
Silicon Dioxide (SiO2)
mineral
Category
Organic Gem Material (Botanical)
Browse organic gem material (botanical) specimens identified by the Rock Identifier community.
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Quartz (Iron-stained or Ferruginous Quartz)
Silicon Dioxide (SiO2)
mineral
Red Jasper (possibly Carnelian)
Silicon Dioxide (SiO2) with Hematite impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (pure native carbon, C)
mineral
Red Jasper (Heliotrope family variant)
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
sedimentary
Smoky Quartz Cluster
Quartz (Silicon Dioxide) - SiO2
mineral
Diamond (Lesedi La Rona specimen)
Diamond (Pure Carbon, C)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Petrified Wood (Silicified Wood)
Silicified Wood (primarily Chalcedony/Quartz, SiO2)
mineral
Chert (Flint Pebbles)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varietal: Jasper or Flint)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Banded Chert (or Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Rough Dark Green Sapphire
Corundum (Al2O3)
mineral
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Pink Marble (Quartzite or Calcite mix)
Metamorphosed Limestone / Quartzite (CaCO3 or SiO2 with iron impurities)
metamorphic
Rough Emerald Crystals
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Garnet in Quartz Matrix
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz (SiO2)
metamorphic
Peridotite (Dunite)
Peridotite (comprising mainly Olivine)
igneous
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Carved Mottled Greenish-Yellow Crystal/Glass Object
Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.
Man-made Object/Uncertain Mineral
Chert (White/Light Tan)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Dragon Vein Agate (Dyed)
SiO2
mineral
Chert (often called Flint when dark)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Rhodonite
Manganese Silicate (Mn, Fe, Mg, Ca)SiO3
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
Mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2)
mineral
Rhinestone
Artificial Glass/Crystal
gemstone
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Peridotite (Dunite)
Olivine-rich Peridotite ((Mg,Fe)2SiO4)
igneous
Quartz (Yellow/Citrine variety)
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral