Sandstone
Arenite (SiO2 variety)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 variety)
Pyrite
Iron Sulfide (FeS2)
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
Yellow calcite (tumbled honey or lemon calcite)
Calcite, calcium carbonate (CaCO₃), likely a yellow/orange calcite variety
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Chert (or Flint)
Mocrocrystalline Quartz (SiO2)
Hypersthene
Hypersthene ((Mg,Fe)SiO3)
Jasper (Banded Argillite/Chert mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
Labradorite Granite (Blue Pearl)
Anorthosite (dominated by Labradorite feldspar)
Pyrite
Iron Sulfide (FeS2)
Chert (Green variety)
Microcrystalline Opaline/Quartz (SiO2)
Blue Quartz / Glass Gemstone Pendant
SiO2 (Silicon Dioxide) or Synthetic Glass
Banded Calcite
Calcite (Calcium Carbonate, CaCO3)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Satin Spar (Satin Spar Selenite)
Gypsum (CaSO4·2H2O)
Amazonite (likely mixed with other feldspars/minerals)
Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
Jasper
Silicon Dioxide (SiO2) with impurities
Quartz Vein Rock
Silicon dioxide (SiO2) within a host rock matrix
Jade (likely Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
Hematite
Hematite (Fe2O3)
Quartz
Silicon Dioxide (SiO2)
Chert (Jasper/Chalcedony variety)
Silicon Dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Pyrite
Pyrite (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)
Mixed Silicates and Oxides (predominantly SiO2 group minerals)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Chert (Iron-stained)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Jasper / Agate
Silicon dioxide (SiO2)
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
Citrine
SiO2 (Silicon Dioxide)
Agate (specifically, likely a geode slice or nodule)
Agate (a variety of Chalcedony, with chemical formula SiO2)
Fluorite
Calcium fluoride (CaF2)
Satin Spar (often marketed as Selenite)
Fibrous Gypsum (CaSO4·2H2O)
Pyrite
Iron sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Pyrite (Tumbled)
Iron Disulfide (FeS2)