Quartz (Raw Rose and Milky varieties)
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Gemstone Variety Of Beryl)
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
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Garnet (likely Almandine or Pyrope)
Garnet Group, Nesosilicates (Complex chemistry, e.g., Almandine: Fe3Al2Si3O12)
mineral
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
metamorphic
Jasper (Green variety)
Silicon Dioxide (SiO₂)
sedimentary
Chert (Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Banded Variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Polished carnelian/chalcedony
Carnelian, a red-orange variety of microcrystalline quartz (SiO₂)
gemstone
Agate
SiO2 (Silicon dioxide, cryptocrystalline quartz variety chalcedony)
gemstone
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Yellow Jasper
Jasper, a microcrystalline variety of Quartz (SiO2) with iron inclusions
sedimentary
Sunstone
Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8
Mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
mineral
Chert (containing Flint nodules)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Shell Cameo (Sardonyx Shell)
Cassis madagascariensis (Sardonyx shell)
mineral (biogenic silica/calcium carbonate substrate)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Jasper (Yellow/Brown variety)
Silicon Dioxide (SiO2) with iron oxide impurities
sedimentary
Blue Sapphire
Corundum (Al2O3)
mineral
Chert (often called Flint or Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Jasper (Red Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Barite
Barium sulfate (BaSO4)
mineral
Pyrite or Chalcopyrite
Iron sulfide (FeS2) or Copper iron sulfide (CuFeS2)
mineral
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Tumbled carnelian agate
Cryptocrystalline chalcedony (SiO₂), an iron-colored variety of agate
gemstone
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Yellow Jasper (with Iron staining)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Mixed mineral and rock collection
Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones
mineral
Tiger's Eye (Golden and Blue Pietersite mix)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Brecciated jasper (likely red-and-cream jasper)
Jasper, an opaque microcrystalline variety of quartz; primarily cryptocrystalline SiO₂ with iron-oxide staining and possible chalcedony/quartz veining
gemstone
Jasper
Silicon dioxide (SiO2)
sedimentary
Blue Lace Agate
Chalcedony (a form of Quartz) - SiO2
Mineral
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2
metamorphic
Porphyry (Flower Stone)
Porphyry (Andesite or Basalt matrix)
igneous
Jasper
Jasper (Silica/Quartz) - SiO2
sedimentary