Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Category
Mineral, Sediment
Browse mineral, sediment specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Dalmatian Jasper
Peralkaline rhyolite with Arfvedsonite inclusions
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (with potentially high Feldspar/Arkose content)
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Moonstone
Orthoclase feldspar ((K,Na)AlSi3O8)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Yellow Aventurine
Quartz (Silicon Dioxide - SiO2) with inclusions of Mica
Mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Agate
Silicon dioxide (SiO2) - variety Chalcedony
mineral
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Blue Quartz (Dumortierite Quartz)
Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Satin Spar Selenite
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sulfur
Native Sulfur (S8)
mineral
Sphalerite in Matrix (Polished Point)
Zinc sulfide (Zn,Fe)S
mineral
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Metamorphic
Milky Quartz Geode with Chlorite
Silicon Dioxide (SiO2) with Chlorite group inclusions
mineral
Granite (with Beryl/Aquamarine)
Granite (Feldspar, Quartz, Mica, and Beryl Be3Al2Si6O18)
igneous
Raw Diamond (Rough Uncut)
Diamond (C - pure carbon)
mineral
Milky Quartz (Water-Worn Cobble)
Silicon Dioxide (SiO2)
mineral
Meteorite (Chondrite)
Stony Meteorite (Ordinary Chondrite)
igneous
Snowflake Obsidian
Volcanic glass with Cristobalite inclusions (70–75% SiO2)
igneous
Schist
Mica Schist (Quartz-Muscovite-Biotite Schist)
metamorphic
Calcite
Calcite (CaCO3)
Mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Golden Healer Quartz
Silicon Dioxide (SiO2) with Ferruginous (Iron Oxide) inclusions
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (pure carbon, C)
mineral