Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Category
Mineral (Gemstone Variety Of Beryl)
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Learn about Mineral (Gemstone Variety Of Beryl) in the encyclopedia
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Rose Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Gemstone and Mineral Collection
Silicon Dioxide (SiO2) based minerals and others
mineral
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)
Mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Blue cabochon gemstone, likely sapphire
Corundum (Al₂O₃), blue variety colored mainly by iron and titanium
gemstone
White Quartz
Quartz (SiO2)
Mineral
Smoky Quartz
Quartz (SiO₂)
Mineral
Tiger's Eye
Tiger's Eye (a variety of Chalcedony, which is a microcrystalline quartz with fibrous inclusions of oxidized crocidolite)
Mineral
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
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
Chert (Flint / Chalcedony variety)
Microcrystalline Quartz (SiO2)
sedimentary
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Jasper
Silicon Dioxide (SiO2) - Impure Variety of Chert
sedimentary
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Chert (Blue-Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
gemstone
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Tumbled milky quartz pebble
Quartz, silicon dioxide (SiO₂), microcrystalline to coarsely crystalline variety
mineral
Milky Quartz/Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint or Common Chert)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Rose or Milky variety fragment)
Silicon Dioxide (SiO2)
mineral
Yellow Aventurine
Silicon Dioxide (SiO2) with inclusion of Mica
Mineral (Variety of Quartz)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Mineral (Variety of Quartz)
Chinese Jade (Green Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
gemstone
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Fe2O3)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Breccia
Clastic Breccia (General mineral composition depends on fragments, often SiO2 or CaCO3)
sedimentary
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Mineral
Mixed Quartz and Jasper Pebbles
Silicon Dioxide (SiO2)
Mineral
Multi-gemstone Quartz and Fluorite Bracelet
Silicon Dioxide (SiO2) and Calcium Fluoride (CaF2)
mineral
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Tumbled carnelian
Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)
gemstone
Tumbled carnelian agate (probable)
Cryptocrystalline quartz, SiO₂; chalcedony variety colored by iron oxides
gemstone
Likely yellow chalcedony or citrine cabochon
Cryptocrystalline quartz (chalcedony), SiO₂; alternatively quartz variety citrine
gemstone
Polished carnelian
Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)
gemstone
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
Mineral
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with iron and other mineral inclusions
mineral