Apatite
Calcium phosphate fluorapatite, Ca5(PO4)3(F,Cl,OH)
mineral
Category
Sedimentary (Processed Mineral Product)
Browse sedimentary (processed mineral product) specimens identified by the Rock Identifier community.
Learn about Sedimentary (Processed Mineral Product) in the encyclopedia
View all →
Petrified Wood
Silicified wood (SiO2)
sedimentary
Slag (Industrial)
N/A (Anthropogenic Slag)
industrial by-product
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Mixed Rock Assortment
Polylithic geological specimens
sedimentary
Mixed Quartz and Mineral Gravel
Silicon Dioxide (SiO2) and assorted silicate minerals
mineral
Weathered, iron-stained quartz-rich pebble (uncertain identification)
Microcrystalline quartz, SiO₂, with iron-oxide/hydroxide staining and dark matrix inclusions
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Greenstone (Greenschist facies)
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
metamorphic
Carved quartz (likely rose quartz and green aventurine/quartz)
Quartz, silicon dioxide (SiO₂); green material may be aventurine quartz or serpentine
gemstone
Mixed Tumbled Gemstones
Various silicate and oxide minerals
mineral
Mixed Tumbled Gemstones and Minerals
Various silicate and oxide minerals
mineral
Sulfur
Sulfur (S)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Himalayan Pink Salt
Halite (NaCl) with iron oxide inclusions
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Crushed Stone (Basalt/Gabbro)
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Pegmatitic granite
Quartz–feldspar–mica granite pegmatite
igneous
Hematite Rose
Iron Oxide, Fe2O3
mineral
Likely vesicular volcanic rock (possibly pumice or scoria)
Vesicular volcanic rock; exact identification requires a fresh, close-up sample
igneous
Tumbled milky quartz pebble
Quartz (SiO₂), likely massive milky quartz
mineral
Rose Quartz Beads
Crystalline Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
gemstone
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Granite
Intrusive Igneous Rock (composed mainly of quartz, alkali feldspar, and plagioclase)
igneous
Likely tumbled yellow-orange mineral or glassy stone
Indeterminate from photograph; possibilities include yellow jasper, calcite, agate, or dyed quartz
mineral
Weathered gneiss
Banded gneiss, commonly composed of quartz, feldspar, and mica
metamorphic
Chert / Flint
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Flint / Chert Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Petrified Wood
Silicified wood (SiO2)
fossil
Shark Tooth Fossil
Chondrichthyes fossilized tooth
fossil
Dragon Vein Agate (Dyed/Fractured Quartz)
Silicon dioxide (SiO2)
gemstone
Milky quartz crystal
Quartz, silicon dioxide (SiO₂), likely a small prismatic crystal or crystal fragment
mineral
River Pebble
Polished Rock Fragment
sedimentary
Shale
Sedimentary rock composed of clay minerals and quartz
sedimentary
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
sedimentary
Kyanite
Kyanite (Al2SiO5)
Mineral
Chert (Flint/Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary