Pink Quartzite
Metamorphic Quartz Sandstone
metamorphic
Category
Non Geological
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Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Basalt cobble
Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and clinopyroxene with possible olivine and magnetite
igneous
Quartz-veined metamorphic rock, likely greenschist or altered basalt
Chlorite–actinolite schist or metabasalt with a milky quartz vein
metamorphic
Raw Sapphire / Corundum
Corundum (Al2O3 - Aluminium oxide)
mineral
Galena (with Matrix)
Lead Sulfide (PbS)
mineral
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
Muscovite Mica (with Quartz)
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Chondrite Meteorite
Ordinary Chondrite (S-type asteroid origin)
igneous
Barite
Barium Sulfate (BaSO4)
mineral
Basalt pebble
Fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine
igneous
Chert (Flint/Chalcedony)
Silicon Dioxide (SiO2)
sedimentary
Raw Sapphire (Corundum)
Aluminum oxide (Al2O3)
gemstone
Green Chert
Microcrystalline Quartz (SiO2)
sedimentary
Pink Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (River Stone)
Quartzite (SiO2)
metamorphic
Biological Specimen (Domestic Dog)
Canis lupus familiaris
Organic (Non-rock)
Cut diamond-like gemstone
Likely cubic zirconia (zirconium dioxide, ZrO₂) or glass; natural diamond (carbon, C) cannot be confirmed from an image
gemstone
Iron-stained weathered granite or granitic gneiss
Granite/granitic gneiss, dominated by quartz, feldspar, and mica, with iron-oxide weathering
igneous
Banded Rhyolite (Wonderstone)
Rhyolite (High-silica volcanic rock)
igneous
Dyed Quartzite (Pink/Magenta)
Silicon Dioxide (SiO2) - Artificially Colored Quartzite
mineral
Quartzite
Silica (SiO2) quartzite
metamorphic
Quartzite
Quartzite (Metamorphic rock primarily composed of SiO2)
metamorphic
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2)
mineral
Leopard Skin Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
sedimentary
Quartzite (or Massive Quartz)
Silicon Dioxide (SiO2)
metamorphic
Iron Slag
Ferrous Slag (Industrial Byproduct)
mineraloid (anthropogenic byproduct)
Pumice or Vesicular Basalt/Scoria (water-worn)
Vesicular volcanic rock
igneous
Anthracite Coal
Anthracite
metamorphic
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite Arrowhead (Archaeological Lithic)
Recrystallized Quartz (SiO2)
metamorphic
Aquamarine-bearing quartz specimen
Beryl (Be₃Al₂Si₆O₁₈), likely aquamarine, on quartz (SiO₂)
mineral
Likely limestone or chalky carbonate rock
Calcite-rich carbonate rock; chiefly calcium carbonate (CaCO₃)
sedimentary
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite River Rock
Quartzite (SiO2)
metamorphic
Obsidian
Volcanic Glass (High silica amorphous rock)
igneous
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Obsidian
Volcanic Glass (Mainly SiO2)
igneous