Ruby
Corundum (Al2O3 with Chromium trace elements)
mineral
Category
Sedimentary Or Igneous (Host Environment)
Browse sedimentary or igneous (host environment) specimens identified by the Rock Identifier community.
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite Gneiss River Rock
Gneiss
Metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Red Jasper (Opaque Chalcedony)
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
mineral
Jasper with Quartz Veining
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Smoky Quartz in Matrix
Silicon dioxide (SiO2) within Pegmatite/Gneiss
igneous
Amber-bearing Coal/Sedimentary Rock
Bituminous coal or carbonaceous siltstone with Fossilized Tree Resin (C10H16O)
sedimentary
Druzy Quartz on Host Rock
Silicon Dioxide (SiO2)
mineral
Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz Vein in Host Rock
Quartz (SiO2) in metamorphic host rock (likely schist or phyllite)
metamorphic
Geode with Quartz and Chalcedony
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode
Silicon Dioxide (SiO2) in Host Rock
sedimentary
Red Jasper
Jasper (Silica/Silicon Dioxide, SiO2 plus iron inclusions)
sedimentary
Septarian Nodule (Polished)
Septarian concretion (Calcite, Aragonite, Limestone)
sedimentary
Quartz
Quartz (SiO2 - Silicon Dioxide)
Mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (Common Opal/Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Almandine Garnet in Matrix
Almandine (Fe3Al2(SiO4)3)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Bull Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (likely Jasper or Chert variety)
Quartz (SiO₂)
Mineral
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)
mineral
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 inclusions)
sedimentary
Greenstone or Chlorite Schist
Greenschist / Chlorite schist
metamorphic
Shale
Lutaceous Sedimentary Rock
sedimentary
Yellow Sapphire
Corundum (Al2O3) with iron impurities
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
Mineral
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
sedimentary
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Basalt and Quartz Pebble
Basalt (Igneous) and Quartzite/Quartz (SiO2) pebble
igneous and sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chrysocolla (on host rock)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)
mineral
Epidote in Matrix
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
Mineral / Sedimentary
River Stone (Granitic Gneiss)
Foliated Granitic Gneiss
metamorphic
General Gravel (River Rock/River Stones)
Mixed Lithic Sediments (Conglomerate Clasts)
sedimentary
Green Moss Agate
Agate (Silicon Dioxide - SiO2 with inclusions of Manganese/Iron oxides)
mineral