Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Category
Metamorphic (Low Grade)
Browse metamorphic (low grade) specimens identified by the Rock Identifier community.
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Anthracite Coal
Anthracite (Carbon-based solid)
metamorphic
Gold Ore in Quartz
Auriferous Quartz (Gold: Au; Quartz: SiO2)
Mineral
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Yellow Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Anthracite
Anthracite (highest-grade coal)
metamorphic
Emerald (Tumbled Beryl)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Anthracite Coal
Anthracite (Carbon Content: 86%–98%)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gossan (Iron Hat)
Limonitic Gossan (predominantly FeO(OH)·nH2O)
igneous/metamorphic derivative
Moonstone
Orthoclase Feldspar (KAlSi3O8) or Albite mixtures
mineral
Moonstone
Orthoclase (Potassium Aluminum Silicate), Formula: (K,Na)AlSi3O8
mineral
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
mineral
Slate with Red Sandstone Landscaping Rock
Foliated Pelitic Metamorphic Rock (Slate) and Ferruginous Sandstone
metamorphic and sedimentary
Anthracite Coal
Anthracite (high-rank coal / Carbon)
metamorphic
Anthracite Coal
Anthracite (Carbon based fossil fuel)
metamorphic
Anthracite Coal
Anthracite
metamorphic
Basalt with Epidote (Porphyry)
Basalt (with inclusions of Epidote/Feldspar)
igneous
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
mineral
Limonite Concretion
Goethite-rich Concretion (FeO(OH))
sedimentary
Mica Schist with Garnet inclusions
Mica Schist (primarily Muscovite and Biotite - KAl2(AlSi3O10)(OH)2)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Aquamarine (Pendant) and Jasper (Beads)
Beryllium aluminum silicate (Be3Al2Si6O18) with Chalcedony (SiO2)
mineral
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
metamorphic
Basalt (Greenstone/Trap Rock)
Basalt (dominated by plagioclase feldspar and pyroxene)
igneous
Ruby (Pink to Red Corundum)
Al2O3 (Corundum with Chromium impurities)
mineral
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
mineral
Chert / Greenstone
Silicon Dioxide (SiO2) with impurities
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Anthracite Coal
Anthracite (Carbon Content: 86%-97%)
metamorphic
Ironstone Concretion (Nutstone)
Ironstone (with High Limonite/Hematite Content)
sedimentary
Siltstone
Siltstone
sedimentary
Serpentine (Greenstone)
Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)
metamorphic
Seraphinite
Clinochlore (a variety of the chlorite group)
mineral
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
mineral