Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Primary) With Artificial Modification
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
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Almandine Garnet
Almandine - Fe3Al2(SiO4)3
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Specular Hematite (Specularite)
Hematite (Iron(III) oxide) - Fe2O3
mineral
Quartz (Iron-Stained or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Diamond
Diamond (Native Carbon, C)
mineral
Calcite
Calcite (CaCO3)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Auriferous Quartz (Gold-bearing Quartz)
Silicon Dioxide (SiO2) with trace Gold (Au) and Iron Oxides
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
mineral
Malaysian 50 Sen Coin
Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)
Man-made object (coin)
Turquoise color-bead and Hematite necklace
Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Hematite (Fe2O3)
mineral
Basalt (Crushed Stone Aggregate)
Mafic Volcanic Basalt (Major Minerals: Plagioclase Feldspar, Pyroxene, Olivine)
igneous
Pearl
Calcium carbonate (CaCO3) + organic conchiolin (Biogenic Mineral)
mineral
Peridot (Olivine)
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
mineral
Black Pearl (Tahitian Type)
Aragonite / Conchiolin composite (CaCO3)
mineraloid
Unakite
Unakite (altered granitic rock: SiO2 + Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Beryl (likely Emerald or Aquamarine in matrix)
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Diamond
Carbon (C)
mineral
Gold Ore in Quartz/Schist
Auriferous Quartz and Sulfide-bearing Schist
Metamorphic/Igneous (Hydrothermal)
Bloodstone (Heliotrope)
Silicon Dioxide (SiO2) with iron silicate and iron oxide inclusions
Mineral
Gold Ore in Matrix
Native Gold (Au) in Quartz/Limonite host rock
mineral
Garnet and Quartz
Pyrope or Almandine (Red Garnets) and Quartz (Center Stone)
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Amethyst (Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Pearl (incorporated into jewelry)
Aragonite and Calcite (CaCO3)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Galena
Galena (Lead Sulfide), PbS
mineral
Copper Ore (likely Chalcopyrite in Matrix)
Chalcopyrite (CuFeS2)
mineral
Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Rough Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Black Obsidian
Obsidian (Volcanic Glass, SiO2 + impurities)
igneous
Quartz (Milky/Common variety)
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Citrine or Yellow Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic Felsic Igneous Rock
igneous
Quartzite Cobble
Meta-quartzite (90%+ SiO2)
metamorphic
Quartz (Sand Grain size)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral