Peridot
Olivine (Mg, Fe)2SiO4
mineral
Category
Mineral (Organic Gemstone)
Browse mineral (organic gemstone) specimens identified by the Rock Identifier community.
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst (Faceted)
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian (a variety of Chalcedony)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
mineral
Garden Quartz (Lodalite)
Silicon Dioxide (SiO2) with various inclusions
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Carnelian
Carnelian (a variety of Chalcedony), SiO2 (Silicon Dioxide)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Moonstone (Blue Flash)
Potassium Aluminum Silicate (KAlSi3O8), a variety of Orthoclase Feldspar
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Sunstone
Oligoclase (a variety of Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8
mineral
Amethyst
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
mineral
Charoite
Charoite (K(Ca,Na)2Si4O10(OH,F)·H2O)
mineral
Carnelian
Carnelian (Silicon Dioxide - SiO2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
mineral
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ impurities)
mineral
Banded Calcite (Tumbled)
Calcium Carbonate (CaCO3)
Mineral
Agate Jasper
Cryptocrystalline Quartz (SiO2) with impurities
mineral
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Agate (specifically Chalcedony nodule)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst Quartz
Silicon Dioxide (SiO2 with iron impurities)
mineral
Pearl
Biogenic CaCO3 (Aragonite)
mineral
Turquoise
Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Zoisite with Ruby / Anyolite
Anyolite (Ca2Al3(SiO4)3(OH) with Chromian Zoisite and Tschermakite inclusions)
metamorphic
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Tiger's Eye (SiO2 with crocidolite inclusions)
mineral
Beryl (var. Heliodor or Aquamarine)
Beryllium Aluminum Cyclosilicate (Be3Al2Si6O18)
mineral
Cat's Eye Moonstone (Feldspar)
Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8) inclusions
mineral
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2 with iron inclusions)
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Shale with Plant Fossils / Carbonaceous Shale
Laminated Mudrock (Siliciclastic)
sedimentary
Tiger's Eye
SiO2 (Quartz with inclusion of iron oxides)
mineral