Limestone (specifically Carboniferous Limestone)
Calcium Carbonate (CaCO3)
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a microcrystalline quartz) specimens identified by the Rock Identifier community.
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Jasper (specifically Bloodstone/Heliotrope or Dark Green Jasper)
Cryptocrystalline Quartz (SiO2) with inclusions
sedimentary
Agate (Plume or Moss Agate variant)
Chalcedony (SiO2) with various inclusions
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Fancy Jasper (Bloodstone variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (White Chert/Flint)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Carnelian (a variety of Chalcedony)
SiO2 (Silicon Dioxide) - Cryptocrystalline Quartz
mineral
Red Granite
Phaneritic Plutonic Felsic Rock (rich in Potassium Feldspar)
igneous
Red Jasper
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Geode (Cracked)
Quartz (Silicon Dioxide, SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Fossilized Wood (Petrified Wood)
Silicified Wood (primarily quartz/chalcedony replacing organic matter)
Sedimentary (with some aspects of mineral replacement)
Banded Calcite (often commercially sold as 'Mexican Onyx' or 'Honey Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) impurities
sedimentary
Carnelian
SiO2 (Silicon Dioxide) - Carnelian variety of Chalcedony
mineral
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (River Pebble)
Quartzite (SiO2)
metamorphic
Jasper (Tumbled)
Silicon Dioxide (SiO₂)
sedimentary
Jasper (Multi-color Chert)
Silicon dioxide (SiO2)
sedimentary
Red Jasper
Jasper (Silicon Dioxide with Iron inclusions - SiO2)
Sedimentary/Metamorphic
Petrified Wood
Silicified Wood (primarily SiO2)
metamorphic
Banded Agate (Polished Slice)
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Chalcedony Nodule (Agate/Chert)
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Chert
Chert (microcrystalline quartz)
sedimentary
Agate (Bead Form)
Agate (Cryptocrystalline Quartz, SiO2)
mineral
Onyx (Black Onyx)
Silicon Dioxide (SiO2)
mineral
Chert (specifically Jasper/Carnelian Agate)
Microcrystalline Quartz (SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (Rich in K-Feldspar)
igneous
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
mineral