Magnetite
Magnetite (Fe3O4)
Category
Browse mineral (gemstone variety of beryl) specimens identified by the Rock Identifier community.
Magnetite
Magnetite (Fe3O4)
Fluorite (often referred to casually as 'Fluorspar' in industrial contexts)
Fluorite (CaF2)
Jasper
Silicon dioxide (SiO2)
Schist
Mica Schist
Malachite in Matrix
Copper Carbonate Hydroxide (Cu2CO3(OH)2)
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with iron and other impurities
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
Turquoise
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
Amethyst (Quartz)
Amethyst (Silicon Dioxide with Iron impurities), SiO2
Silicon Carbide (Carborundum)
Silicon Carbide (SiC) / Moissanite (natural)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Jasper with Chalcedony
Silicon Dioxide (SiO2)
Blue Dyed Agate
Silicon Dioxide (SiO2)
Quartz (Double-Terminated)
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) with Iron Impurities
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Black Tourmaline (Schorl)
Sodium Iron Aluminum Borate Silicate (NaFe3Al6(BO3)3Si6O18(OH)4)
Agate (specifically Carnelian or Honey Agate)
Silicon Dioxide (SiO2)
Agate
Silicon Dioxide (SiO2) - Chalcedony variant
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Orange Satin Spar (Satin Spar Selenite)
Satin Spar - Hydrous Calcium Sulfate (CaSO4·2H2O)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Red Jasper (Polished)
Silicon Dioxide (SiO2) with Hematite inclusions
Chert (White Chert)
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
Schorl (Black Tourmaline) in Matrix
Sodium Iron Aluminum Borosilicate Hydroxide (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
Peridot
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
Desert Rose
Gypsum (variety Selenite) or Barite, CaSO4·2H2O
Amazonite
K(AlSi3O8), Microcline (potassium feldspar)
Chert (Quartz Variety)
Silicon Dioxide (SiO2)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Banded Jasper
Silicon Dioxide (SiO2) with iron oxide and clay impurities
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
Sunstone
Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)
Precious Red Coral
Corallium rubrum / Corallium japonicum
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)