Jasper with Epidote Vein
Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate (Ca2(Al,Fe)3(SiO4)3(OH))
sedimentary
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
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Pink Granite
Phaneritic intrusive igneous rock (rich in Potassium Feldspar)
igneous
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
sedimentary
Quartzite Cobble
Meta-quartzite (SiO2)
metamorphic
Banded Agate (specifically Eye Agate)
Chalcedony (Silicon Dioxide, SiO2)
sedimentary
Quartzite Cobble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Chert (specifically Flint or Dark Chert)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (specifically varieties like Chalcedony or Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Cryptocrystalline Quartz)
Silicon dioxide (SiO2)
sedimentary
Jasper (specifically Yellow or Brown Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (specifically Flint or Common Chert)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate (specifically Crazy Lace Agate style)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (specifically Novaculite)
Microcrystalline Quartz (SiO2)
sedimentary
Baltic Amber (Butterscotch variety)
Succinite
Organic Gemstone/Mineraloid
Baltic Amber (Butterscotch or Egg Yolk Variety)
Succinite (C10H16O)
Organic Gemstone (Mineraloid)
Shell Cameo
Cypraecassis rufa (Bullmouth Queen Helmet Shell)
mineraloid / biogenic specimen
Quartzite
Quartzite (SiO2)
metamorphic
Chert (specifically Novaculite or Porcelainite)
Microcrystalline to Cryptocrystalline Quartz (SiO2)
sedimentary
Jasper (specifically Chert or Orbicular Jasper)
Silicon Dioxide (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron-Oxide cement
sedimentary
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Belemnite Fossil (Guard)
Belemnoidea (Carbonate/Calcite replacement)
sedimentary
Fossilized Coral
Hexagonaria (Rugose and Tabulate coral fossils)
fossil
Granite
Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)
igneous
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Obsidian (Apache Tear)
Obsidian (Amorphous Volcanic Glass / SiO2 with impurities)
igneous
Banded Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Basalt Pebble
Mafic Volcanic Rock (Basalt)
igneous
Basalt (River Pebble)
Mafic volcanic rock (primarily Plagioclase feldspar and Pyroxene)
igneous
Quartzite Cobble
Quartzite (SiO2)
metamorphic
Cat's Eye Shell (Shiva Shell)
Operculum of the Turbo petholatus (Tapestry Turban Snail), predominantly Calcium Carbonate (Aragonite)
mineraloid / biogenic specimen
Chert (specifically Gray Chert)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Gray Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Dalmatian Jasper
Peralkaline rock with Tourmaline spots
igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
igneous
Brown Jasper (Tiger Jasper)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Sedimentary
Chert (with Chalky Cortex)
Silicon Dioxide (SiO2)
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock
igneous