Quartzite
Quartzite (SiO2)
Category
Browse marble specimens identified by the Rock Identifier community.
Quartzite
Quartzite (SiO2)
Quartzite Pebbler
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite (River Stone)
Quartzite (composed primarily of Silicon Dioxide, SiO2)
Ruby (in costume jewelry context)
Corundum (Al2O3) with Chromium impurities
Sandstone Concretion
Moqui Marble / Ironstone Concretion (Iron oxide-cemented sandstone)
Larimar (Pectolite)
NaCa2Si3O8(OH)
Yellow Sapphire (Raw)
Corundum (Al2O3)
Lapis Lazuli
Complex rock primarily containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
Ruby
Corundum (Al2O3 with Chromium impurities)
Ruby
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Blue Sapphire Crystal (Rough)
Corundum (Aluminum Oxide, Al2O3)
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
Optical Calcite
Calcium Carbonate (CaCO3)
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
Quartzite
Quartzite (composed primarily of SiO2)
Quartzite
Quartzite (SiO2)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Grey Quartzite Pebble
Quartzite (primarily SiO2 - Silicon Dioxide)
Quartzite
Quartzite (SiO2)
Quartzite Pebbles
Quartzite (SiO2)
Quartzite
Quartzite (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Quartzite (Yellow/Orange variety)
Quartzite (primarily SiO2)
Quartzite
Quartzite (Primary mineral: SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Pink Quartzite
Quartzite (SiO2 with iron oxide inclusions)
Quartzite (or Milky Quartz pebble)
Quartzite (Metamorphosed Sandstone) / Silicon Dioxide (SiO2)
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (primarily SiO2)
Quartzite
Quartzite (SiO2)
Limonite Concretion (Ironstone)
Limonite (FeO(OH)·nH2O) with Goethite and Hematite
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Serpentinite
Serpentinite (composed primarily of minerals in the serpentine group: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Serpentinite
Serpentinite (complex of lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)
White Marble (Industrial/Architectural)
Recrystallized Calcite (CaCO3)
Banded Calcite (often sold as 'Ocean Jasper' or 'Caribbean Calcite' variant)
Calcium Carbonate (CaCO3) with potential Aragonite inclusions
Calcite (likely a tumbled specimen)
Calcite (CaCO 3 )
Blue Apatite
Fluorapatite (Ca5(PO4)3F)