Amazonite
Potassium Feldspar (KAlSi3O8)
Category
Browse mineral, specifically a variety of quartz specimens identified by the Rock Identifier community.
Amazonite
Potassium Feldspar (KAlSi3O8)
Sandstone
Arenite (primarily composed of SiO2)
Agate (Dyed High-Grade Polished Slice)
Silicon dioxide (SiO2), Chalcedony crystal variety
Chert Pebble (Jasper/Quartz variety)
Microcrystalline Quartz (SiO2)
Blue Aventurine
Silicon Dioxide (SiO2) with inclusions of Dumortierite
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
Indigo Gabbro
Gabbro (composed of plagioclase feldspar, pyroxene, and olivine)
Jasper
Silicon Dioxide (SiO2)
Chert (specifically Flint or Jasper variant)
Microcrystalline silica (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
Quartzite
Quartzite (Primary mineral: Silicon Dioxide, SiO2)
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
Chert (Flint Nobule)
Silicon Dioxide (SiO2)
Red Jasper
Jasper (SiO2 with Fe2O3 inclusions)
Aventurine (likely Green Aventurine)
Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)
Agatized Chert / Chalcedony
Silicon Dioxide (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Quartzite with inclusions
Metamorphosed Quartz-rich Rock (SiO2)
Bumble Bee Jasper
Calcite-bearing Volcanic Tuff (not a true Jasper)
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
Green Calcite
Calcium Carbonate (CaCO3)
Smoky Quartz
Silicon Dioxide (SiO2)
Peach Selenite / Orange Gypsum
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Dendritic Agate (Tumbled)
Silicon Dioxide (SiO2) with inclusions
Greenstone
Greenschist (metamorphosed mafic igneous rock)
Red Quartz (Druzy)
Silicon Dioxide (SiO2) with Hematite inclusions
Yellow Jasper
Chalcedony (Silicon Dioxide with Iron inclusions), SiO2
Banded Calcite (often sold as Caribbean Calcite or Honey Calcite)
Calcium Carbonate (CaCO3)
Apache Tears (Obsidian)
Hydrated Volcanic Glass (Amorphous SiO2 + H2O)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Pink Granite
Phaneritic intrusive igneous rock (Felsic)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Quartz (Pink/Orange Variety)
Silicon Dioxide (SiO2)
Fancy Jasper
Chalcedony (cryptocrystalline quartz) with inclusions
Jasper
Silicon dioxide (SiO2)
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Picture Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Chert (specifically White Chert or Novaculite)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz
Quartz (SiO2 - Silicon Dioxide)
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
Green Moss Agate
Agate (Silicon Dioxide - SiO2) with inclusions of hornblende or chlorite