Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Category
Mineral (Variety Of Chalcedony)
Browse mineral (variety of chalcedony) specimens identified by the Rock Identifier community.
Learn about Mineral (Variety Of Chalcedony) in the encyclopedia
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Moss Agate
Chalcedony (Silicon Dioxide, SiO2) with inclusions
mineral
Chalcedony in Matrix (likely Agatized Coral or Chert)
Silicon Dioxide (SiO2)
sedimentary
Tumbled Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
sedimentary
Chiastolite
Andalusite variety Chiastolite
mineral
Aventurine
Quartz (Aventurine variety)
Mineral
Fuchsite
K(Al,Cr)2(AlSi3)O10(OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (variety Amazonite), K(AlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Satin Spar Selenite
Fibrous Gypsum (CaSO4·2H2O)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron Oxide inclusions
mineral
Bloodstone (Heliotrope)
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz (White/Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Lake Superior Agate
Chalcedony (Microcrystalline Quartz, SiO2)
sedimentary
Picture Jasper
Tectonically broken chalcedony (SiO2)
sedimentary
Botryoidal Chalcedony / Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Mineral and Rock Collection
Mixed geological specimens (Quartz, Amethyst, Rose Quartz, Jasper, Epidote, Chert)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Bronzite
Enstatite (var. Bronzite), (Mg,Fe)SiO3
mineral
Tourmaline crystal
Tourmaline Group (Complex Borosilicate)
mineral
Polished banded agate (likely carnelian/onyx variety)
Microcrystalline quartz, SiO₂ (chalcedony with iron-oxide bands)
gemstone
Raw Sapphire (Corundum)
Aluminum oxide (Al2O3)
gemstone
Red Jasper
Jasper (a variety of Quartz, SiO2)
Mineral
Jasper
Jasper (Cryptocrystalline Quartz, SiO2)
sedimentary
Banded Calcite (often sold as Mexican Onyx or Aragonite)
Calcite/Aragonite (Calcium Carbonate, CaCO3)
sedimentary
Chalcedony (Yellow Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
White Quartz Beads
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral