Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
Category
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
Quartzite
Quartzite (SiO2-rich metamorphic rock)
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
Quartzite (Yellow/Tan)
Metamorphic Rock composed of Quartz (SiO₂)
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
Anthracite Coal
Low-grade metamorphic carbonaceous rock
Gneiss
High-grade foliated metamorphic rock
Quartzite River Cobble
Quartzite (primarily SiO2)
Ferruginous Quartzite (Iron-stained Quartzite)
Quartzite with Iron oxides (FeO(OH) / Fe2O3)
White Quartz
Quartz (SiO2)
Marble
Metamorphosed Limestone/Dolomite
Green Aventurine and Clear Quartz
Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)
Unakite
Epidotized Granite
Schist
Schist
Quartzite pebble
Quartzite (SiO2)
White Marble
Recrystallized Calcite (CaCO3) / Marble
White Quartzite
Quartzite (primarily SiO2)
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, antigorite, and chrysotile)
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
Pyrite
Pyrite (Iron Disulfide), FeS2
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
Dendritic Agate (or Dendritic Opal)
SiO2 (for Agate), SiO2·nH2O (for Opal)
Rutilated Quartz
Quartz (SiO2) with Rutile (TiO2) inclusions
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (complex silicate of magnesium, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (SiO2)
Quartzite (River Pebble)
Quartzite (composed primarily of Silica, SiO2)
Calcite
Calcite (Calcium Carbonate, CaCO3)
Green Opal
Hydrated Silica (SiO2·nH2O)
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Quartzite Pebble
Quartzite (SiO2)
Basalt (Porphyritic)
Basalt (Mafic Extrusive Igneous Rock)
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
Quartzite River Rock
Quartzite (primarily SiO2)
Petrified Wood (Silicified Wood)
Silicified Wood / Silicon Dioxide (SiO2)
Greisen
Greisen
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Clear Quartz (Rock Crystal Fragments)
Silicon Dioxide (SiO2)