Pyrite
Iron Sulfide (FeS2)
mineral
Category
Manufactured Glass
Browse manufactured glass specimens identified by the Rock Identifier community.
Green Fluorite
Fluorite (Calcium Fluoride - CaF2)
mineral
Fossiliferous Limestone with Rugose Coral
Calcite (CaCO3) matrix containing Rugosa (order of extinct solitary and colonial corals)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Orange Calcite (Banded Calcite)
Calcium Carbonate (CaCO3)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Amber
Succinate (Fossilized Tree Resin)
mineraloid
Amber
Succinite
Organic mineraloid
White Calcite
Calcium Carbonate (CaCO3)
mineral
Crushed Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Shale (sub-type: Carbonaceous Shale)
Lutaceous Sedimentary Rock
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Schist
Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)
metamorphic
Kyanite
Kyanite (Al2SiO5)
mineral
Kyanite
Kyanite (Al2SiO5)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral, often found as detrital grains in sedimentary rocks
Muscovite Mica (with Schist)
Muscovite - KAl2(AlSi3O10)(OH)2
metamorphic
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Obsidian
Volcanic glass (Mainly SiO2)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
metamorphic
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Chalk (Calcitic)
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Fluorite
Fluoride (Calcium Fluoride - CaF2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - Variety: Chalcedony
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Graphite
Graphite (Native Carbon), Formula: C
Metamorphic
Shale
Fissile Mudrock (Clay-rich Sedimentary Rock)
sedimentary
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Blue Kyanite in Quartz
Kyanite (Al2SiO5)
mineral
Basalt
Basalt (Mafic igneous rock)
igneous
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Basalt
Extrusive Mafic Igneous Rock
igneous