Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Category
Mineral (Variety Of Chalcedony)
Browse mineral (variety of chalcedony) specimens identified by the Rock Identifier community.
Geode (Unopened)
Silica-rich concretion (SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Blue Quartz (specifically Dumortierite Quartz)
SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
mineral
Blue Quartzite (Dyed)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Chert (Jasper)
Silicon Dioxide (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Fuchsite on Quartz
Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Carnelian
Carnelian (Silicon Dioxide: SiO2 with Iron Oxide impurities)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Pyrite Geode (Sparkling Druzy)
Iron Sulfide (FeS2) in Sedimentary Nodule
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Green Calcite (often commercially called Green Onyx)
Calcium Carbonate (CaCO3)
Mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Milk Quartz (Tumbled Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcendony replacing organic matter)
sedimentary
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Black Marble
Recrystallized Calcite (CaCO3)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral