Garnet
Garnet group species (likely Almandine, Fe3Al2(SiO4)3)
mineral
Category
Mineral_rock
Browse mineral_rock specimens identified by the Rock Identifier community.
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Moqui Marble / Ironstone Concretion
Ironstone Concretion (Goethite/Hematite and Sandstone)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Rose Quartz
Quartz (SiO2) with trace amounts of titanium, iron, or manganese
Mineral
Botryoidal Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
mineral
Malachite
Copper carbonate hydroxide Cu2CO3(OH)2
mineral
Chert (Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Chrysocolla
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)
mineral
Fossilized Blastoid
Pentremites (Class Blastoidea)
sedimentary
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Carnelian and White Quartz Bracelet
Silicon Dioxide (SiO2) - specifically Carnelian (Chalcedony) and Rock Crystal/Snow Quartz
mineral
Dalmation Jasper
Perthitic Feldspar with Arfvedsonite inclusions
igneous
Rose Quartz
SiO2 (Silicon Dioxide)
mineral
Obsidian
Volcanic Glass (Amorphous SiO2)
igneous
Yellow Ochre / Limonite
FeO(OH)·nH2O (Hydrated Iron Oxide Mix)
mineral
Rose Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Chert Nodules
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Druzy on Matrix
Silicon Dioxide (SiO2)
mineral
Vesicular Basalt (Lava Rock)
Vesicular basalt
igneous
Weathered quartz-rich rock, likely sandstone or quartzite
Quartz arenite (sandstone) or quartzite; predominantly SiO₂
sedimentary
Basalt or Slag
Extrusive Igneous Rock / Industrial Slag
igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Ammonite Fossil
Ammonoidea subclass (calcium carbonate / silica replacement)
fossil
Sandstone
Sandstone (SiO2 rich)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Murex Fossil
Muricidae (Calcium Carbonate fossilization)
fossil
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
mineral
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (Iron-rich)
sedimentary
Conglomerate
Conglomerate
Sedimentary Rock
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Malachite
Malachite (Cu2CO3(OH)2)
mineral