Jasper
Silicon dioxide (SiO2) with iron impurities
sedimentary
Category
Mineral; Variety Of Quartz
Browse mineral; variety of quartz specimens identified by the Rock Identifier community.
Chert (with Quartz Vein)
Chert (Siliceous sedimentary rock, predominantly Microcrystalline Quartz SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) - variety Jasper
sedimentary
Eagle Eye Stone (Green Tiger's Eye)
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions)
mineral
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Green Jasper
Silicon Dioxide (SiO2) with impurities
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Beryl (Emerald Variety)
Beryllium Aluminum Silicate (Be3Al2(SiO3)6)
mineral
Jasper
Jasper (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Black Onyx
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Agate (Moss or Banded Agate variety)
Agate (Silicon Dioxide - SiO2)
mineral
BROWN GRANITE (likely 'Tan Brown' or similar)
Granite (specifically a variety rich in orthoclase feldspar, often with biotite and possibly hornblende)
igneous
Red Jasper
Jasper (Silicon Dioxide with iron oxide inclusions), SiO2
mineral
Epidote with Quartz and Feldspar
Ca2(Al2,Fe3+)(SiO4)3(OH) (Epidote complex)
metamorphic
Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
River Jasper (Chert/Chalcedony mix)
Silicon Dioxide (SiO2) with iron oxide and chlorite inclusions
sedimentary
Zebra Jasper
Silicon Dioxide (SiO2) with impurities; typically a form of Chalcedony/Microcrystalline Quartz
sedimentary
Jasper (with Manganese or Iron inclusions)
Silicon Dioxide (SiO2)
sedimentary
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Picture Jasper (specifically Biggs or Deschutes variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (Iron-stained)
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Banded Jasper (possibly "Picture Jasper")
Jasper (a microcrystalline variety of Quartz / Silicon Dioxide - SiO2)
Sedimentary rock (specifically a chemical sedimentary rock, or a chert if considered purely mineral aggregate)
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Quartz (on matrix)
Quartz (Silicon Dioxide, SiO₂)
Mineral
Chert (Nodule)
Silicon Dioxide (SiO2)
sedimentary
Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)
Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Labradorite (Feldspar)
Labradorite: (Ca,Na)(Al,Si)4O8
mineral
Banded Agate (specifically Lake Superior Agate style)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide (SiO2) with iron oxide and other mineral impurities
sedimentary (chemical/biological origin)
Sandstone
Arenite (primarily composed of SiO2)
sedimentary
Blue Lace Agate
Silicon Dioxide (SiO₂)
Mineral (Variety of Chalcedony/Quartz)
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Red Sandstone
Sandstone (mainly SiO2 with Iron Oxide cement)
sedimentary
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
mineral
Green Quartzite
Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)
metamorphic
Chert (Flint Nodules)
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary
Chert Nodule
Chert (Cryptocrystalline variety of Quartz, SiO2)
sedimentary