Chalcedony (Agate/Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Specifically A Mineraloid)
Browse mineral (specifically a mineraloid) specimens identified by the Rock Identifier community.
Learn about Mineral (Specifically A Mineraloid) in the encyclopedia
View all →
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Brown Jasper
Silicon Dioxide (SiO2)
sedimentary
Basalt
Extrusive mafic igneous rock
igneous
Iron Meteorite
Siderite (Iron-Nickel Meteorite)
meteorite
Red Sandstone
Arenite (specifically Quartz Arenite with Iron Oxide)
sedimentary
Red Agate Sphere
Chalcedony (SiO2 with iron oxide inclusions)
sedimentary
Fossilized Shark Tooth (Scapanorhynchus)
Scapanorhynchus texanus
fossil
Pink Granite (River Pebble)
Phaneritic Felsic Igneous Rock
igneous
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Chalcedony (SiO2) with goethite or limonite inclusions
sedimentary
Pink Granite
Phaneritic Felsic Igneous Rock (high K-feldspar)
igneous
Green Jasper (Heliotrope / Bloodstone variety)
Silicon Dioxide (SiO₂)
sedimentary
Chert (or Flint)
Chert (cryptocrystalline quartz), SiO2
Sedimentary
Yellow Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Chert (Grey/Black variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Jasper and Yellow Chert (Tumbled)
Microcrystalline Quartz (SiO2)
sedimentary
Flint Pebble
SiO2 (Microcrystalline Quartz / Chalcedony)
sedimentary
Flint / Chert Pebble
Cryptocrystalline quartz (SiO2)
sedimentary
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary
Moonstone
Orthoclase feldspar (KAlSi3O8) with albite lamellae
gemstone
Stromatolite Fossil
Stromatolite (Cyanobacteria biogenic sedimentary structure)
fossil
Limestone (specifically Dolomitic/Crystalline Limestone)
Sedimentary Carbonate Rock (CaCO3 / CaMg(CO3)2)
sedimentary
Chert (specifically Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Granite (specifically Red Granite)
Phaneritic Plutonic Rock (High in Alkali Feldspar and Quartz)
igneous
Chert (specifically Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint)
Silicon dioxide (SiO2)
sedimentary
Ferruginous Slag (Iron Smelting Byproduct)
Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)
Antropogenic Glass / Mineraloid
Peanut Wood
Silicified (Petrified) Wood - SiO2 (Silicon Dioxide)
sedimentary
Puddingstone (Quartzite Conglomerate with Jasper inclusions)
Metaconglomerate (Silicon Dioxide, SiO2)
sedimentary
Limestone (specifically fossiliferous/skeletal limestone)
Calcium Carbonate (CaCO3)
sedimentary
Chert (specifically Flint)
Microcrystalline quartz (SiO2)
sedimentary
Chert (specifically Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Flint)
Chert (SiO2)
sedimentary
Brown Antique Granite
Anorthosite (Technically a plutonic rock composed mainly of plagioclase feldspar)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Porphyry
Porphyritic Andesite/Dacite
igneous
Shiva Lingam
Cryptocrystalline Quartz (Jasperiod Silicate with Iron Oxide inclusions)
sedimentary
Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Chert (specifically Jasper)
Silicon dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic