White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Bog Iron / Limonite Concretion
Goethite/Limonite mixture (FeO(OH)·nH2O)
sedimentary
Granite (Weathered/Oxidized)
Phaneritic Felsic Igneous Rock (composed of Quartz, Orthoclase Feldspar, and Mica)
igneous
Gneiss (specifically Amphibolite Gneiss)
Gneiss
metamorphic
Jasper
Jasper (Cryptocrystalline Quartz; SiO2)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Soapstone (Steatite)
Steatite (primarily Talc: Mg3Si4O10(OH)2)
metamorphic
Zebra Jasper
Impure variety of Silica (SiO2)
sedimentary
Iron-stained Milky Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Moss Agate
Silicon Dioxide with inclusions (SiO2 + Fe/Mg/Mn/Chlorite)
mineral
Petrified Wood
Silicified Wood (SiO2)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Sulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Howlite
Dyed Howlite (Ca2B5SiO9(OH)5)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Milky Quartz
Silicon dioxide (SiO2)
mineral
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral
Diorite river pebble
Diorite (intermediate plutonic rock)
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Gray Granite / Rhyolite
Felsic Igneous Rock (Granitoid)
igneous
Uraninite (Pitchblende)
Uranium dioxide (UO2)
mineral
Septarian Nodule (Dragon Stone)
Septarian concretion (Complex of Calcite, Aragonite, and Limestone/Clay)
sedimentary
Blue Cracked Quartz (Dyed Fire Crackle Quartz)
Silicon Dioxide (SiO2) with synthetic dye
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Felsic Igneous Rock (likely Rhyolite or weathered Granite)
Felsic Volcanic/Plutonic Rock
igneous
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Quartzite (River Pebble)
Metamorphosed sandstone (SiO2)
metamorphic
Rough Diamond
Diamond (pure Carbon, C)
mineral
Red Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite
igneous
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Red Vanadinite on Matrix
Vanadinite (Pb5(VO4)3Cl)
mineral
Gneiss with Quartz/Feldspar Vein
Quartz-Feldspathic Gneiss
metamorphic
Granite
Granite
Igneous