Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Category
Sedimentary Or Igneous (Host Environment)
Browse sedimentary or igneous (host environment) specimens identified by the Rock Identifier community.
Quartz Vein in Host Rock
Hydrothermal Quartz (SiO2) in Slates/Schists
metamorphic
Chert (Banded)
Chert (Microcrystalline Silicon Dioxide, SiO2)
sedimentary
Chert
Chert (SiO2)
sedimentary
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Concretionary Sandstone
Clastic Sedimentary Rock (Sandstone with secondary mineral cementation)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
Mineral
Sandstone with trace fossil
Sandstone, possibly with Skolithos or similar trace fossil
sedimentary
Granite (River Cobble)
Granite (rich in feldspar, quartz, and biotite)
igneous
Gold Ore
Auriferous Quartz and Sulfide Mineralization in Host Rock
igneous
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock
Chert (Nodular Chert)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Sapphire (Corundum)
Corundum (Al2O3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Ironstone Concretion (Moqui Marble)
Iron-oxide Concretion (Hydrated ferric oxide, Fe2O3·nH2O)
sedimentary
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Milky Quartz Geode or Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral
Rough Amethyst
Silicon Dioxide (SiO2) with Iron impurities
mineral
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Ruby
Corundum (Al2O3) with Chromium traces
mineral
Orange Calcite (Cleavage Rhomb)
Calcite (Calcium Carbonate, CaCO3)
mineral
Turquoise in Matrix
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Quartz-veined Sedimentary Rock
Hydrothermally veined Clastic Sedimentary Rock (SiO2 veins in Matrix)
sedimentary
Quartz Geode
Crystalline Silicon Dioxide (SiO2) in Geode
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic volcanic rock with secondary mineral fillings)
igneous
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock
igneous
Sandstone (Pebble)
Arenite / Clastic Sedimentary Rock
sedimentary
Chert (Septarian or Banded Nodular Variety)
Microcrystalline Quartz (SiO2)
sedimentary
Agatized Fossil or Chalcedony Nodule
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Chert (Jasper variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Druzzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Common Opal with Host Rock
Opal (Hydrated silica, SiO2·nH2O)
mineral
Smoky Quartz (Herkimer-style)
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary