Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Category
Sedimentary Or Igneous Fragment
Browse sedimentary or igneous fragment specimens identified by the Rock Identifier community.
Rose Quartz
Silicon Dioxide with trace inclusions of dumortierite or titanium (SiO2)
mineral
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6
mineral
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Schist
Mica Schist
metamorphic
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Milky/Rose variety)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Rough Precious Opal
Hydrated Silica (SiO2·nH2O)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Chalcedony (Agate/Blue Quartzite)
Silicon Dioxide (SiO2)
mineral
Chalcedony (River Stone)
Microcrystalline Quartz (SiO2)
mineral
Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)
Gneiss (complex silicate composition)
metamorphic
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Chalcedony
Cryptocrystalline Quartz (SiO2)
Mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (specifically Amphibolite Gneiss)
Gneiss
metamorphic
Pyrite on Quartz (Fool's Gold in Quartz)
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Green Moss Agate / Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron and Manganese inclusions
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with goethite/iron oxide inclusions
sedimentary
Quartz (Iron-stained or Ferruginous)
Silicon Dioxide (SiO2)
mineral
Quartz (in a rock matrix)
Quartz (SiO2)
mineral