Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Sapphire
Corundum (Al2O3)
mineral
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Quartz (Crystal Fragment)
Quartz / Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3) with iron and titanium impurities
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Selenite (Giant Crystals)
Selenite (CaSO4·2H2O)
mineral
Quartz (Yellow/Citrine variety)
Crystalline Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Basalt (River Rock Cobble)
Extrusive mafic igneous rock
igneous
Graphite
Graphite (C)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
sedimentary
Corundum (Sapphire/Ruby in Matrix)
Corundum (Al2O3)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Muscovite (White Mica)
Muscovite - Potassium aluminum silicate: KAl2(AlSi3O10)(F,OH)2
Mineral
Pyrite (locally known as Fool's Gold)
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Pumice
Vesicular volcanic glass
igneous
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Rough Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Kyanite (Blue Kyanite)
Kyanite (Al2SiO5)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Aluminum borate silicate)
mineral
Hypersthene
Hypersthene (Enstatite variety), (Mg,Fe)SiO3
Mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Rhodonite
Rhodonite (Manganese silicate), (Mn,Fe,Mg,Ca)SiO3
mineral
Chalcopyrite in Matrix
Chalcopyrite (CuFeS2)
mineral
Milky Quartz
Quartz / Silicon Dioxide (SiO2)
mineral
Tourmaline
Complex Borosilicate - Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 (Elbaite species)
mineral
Diamond (or Cubic Zirconia imitation)
Carbon (C) - Native Element
mineral