Aquamarine (Beryl)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Category
Metamorphic Or Igneous Alteration
Browse metamorphic or igneous alteration specimens identified by the Rock Identifier community.
Quartzite
Quartzite (SiO2)
metamorphic
Rhodonite
Rhodonite (Manganese Silicate), chemical formula: (Mn,Fe,Mg,Ca)SiO3
Mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
metamorphic
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3) in Quartz (SiO2)
metamorphic
Quartzite with Sandstone/Iron staining
Metamorphic Quartzite (SiO2)
metamorphic
Tiger's Eye (Banded)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Marble
Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)
metamorphic
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals like Antigorite, Lizardite, and Chrysotile)
metamorphic
Quartzite
Metamorphosed Sandstone (Mainly SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Mica Schist with Garnet
Garnetiferous Mica Schist
metamorphic
Mica Schist with Quartz
Mica-Quartz Schist (Muscovite subclass)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Serpentine (Serpentinite)
Serpentinite (complex of minerals including Antigorite, Lizardite, and Chrysotile); (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
metamorphic
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Pyrite in Matrix
Iron Disulfide (FeS2)
mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium)
mineral
Specular Hematite (Specularite)
Hematite (Alpha-Fe2O3)
mineral
Ruby in Fuchsite
Cr-rich Muscovite (Fuchsite) with Corundum (Ruby)
metamorphic
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartzite (River Pebble)
Recrystallized Quartz (SiO2)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Milky Quartz (with Chlorite/Mineral Inclusions)
Silicon Dioxide (SiO2)
mineral
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Quartzite with inclusions
Quartzite (primarily SiO2)
metamorphic
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
mineral
Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite
mineral
Grey Agate
Silicon Dioxide (SiO2) - variety: Agate/Chalcedony
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Quartzite
Metamorphic Rock (Mainly SiO2)
metamorphic
Basalt
Mafic Igneous Rock
igneous
Yellow Agate
Silicon Dioxide (SiO2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral