Pink calcite (likely)
Calcite — calcium carbonate, CaCO₃
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Pink calcite (likely)
Calcite — calcium carbonate, CaCO₃
Basalt
Basalt
Crinoid Stem Fossil
Crinoid ossicle (Phylum Echinodermata)
Chert
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert
Microcrystalline quartz (SiO2)
Flint
SiO2 (Microcrystalline Quartz / Chert)
Chert
Microcrystalline quartz (SiO2)
Chert / Flint
Microcrystalline Quartz (SiO2)
Desert Rose (Gypsum)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (Arrowhead Shard)
Microcrystalline silica (SiO2)
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (color due to lead)
Quartz (Microcrystalline/Chert)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Silicon Dioxide (SiO2)
Pearl
Aragonite (CaCO3 with conchiolin)
Red Chert (Jasper)
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Flint (or Chert)
Cryptocrystalline Quartz (SiO2)
Quartzite (River Pebble)
Quartzite (Mainly SiO2)
Chert (Iron-stained)
Chert (Microcrystalline and Cryptocrystalline Quartz, SiO2)
White Jade (Nephrite)
Nephrite, Ca2(Mg,Fe)5Si8O22(OH)2
Fordite
Anthropogenic paint-rock
Chert (Jasper Variant likely)
Silicon Dioxide (SiO2)
Bismuth Crystal
Bismuth (Bi)
Fossilized oyster shell
Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite
Jasper Marble
Silicon Dioxide (SiO2) with Impurities
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
Amethyst (or Light Amethyst / Rose Quartz)
Quartz (Silicon Dioxide, SiO2)
Coquina / Fossiliferous Limestone
Fossiliferous Limestone (Calcite, CaCO3)
Chert Nodule
Microcrystalline Quartz (SiO2)
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
Pyrite
Iron Sulfide (FeS2)
Chert
Chert (Microcrystalline Quartz, SiO2)
Natural or Cultured Pearl
Calcium Carbonate (Aragonite and Conchiolin), CaCO3
Chert (Flint)
Chert (SiO2)
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
Chert (Common Variety, Jasper)
Microcrystalline Quartz (SiO2)
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)