Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Or Igneous (Context Dependent)
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
Chrome Diopside
Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities
mineral
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz River Pebbles
Silicon Dioxide (SiO2)
sedimentary
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Ruby in Zoisite
Ruby (Corundum, Al2O3) in Zoisite (Calcium aluminum silicate hydroxide, Ca2Al3(SiO4)3(OH)) with some Hornblende
Metamorphic Rock (specifically a rock composed of minerals)
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Calcite
Calcite (CaCO₃, Calcium Carbonate)
Mineral
Marble
Metamorphosed Limestone/Dolomite
metamorphic
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Quartz
Silicon Dioxide (SiO₂)
Mineral
Yellow Quartz (Citrine-colored Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz with Pyrite inclusions
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
mineral
Ruby
Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)
Mineral
Pink Sapphire
Corundum (Al2O3 with trace Chromium and Iron)
mineral
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
White Quartz
Quartz (SiO2)
Mineral
Aventurine (likely Green Aventurine)
Aventurine (a variety of quartz, SiO₂, with common inclusions of fuchsite)
Mineral/Metamorphic Rock
Rhodonite
Rhodonite (Mn, Fe, Mg, Ca)SiO3
mineral
Greenstone (Greywacke or Nephrite Jade variant)
Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Serpentine
Serpentinite (rock), Serpentine group minerals (e.g., Antigorite, Lizardite, Chrysotile)
Metamorphic rock
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Pink Granite / Gneiss
Felsic Plutonic Rock (Granite) with Gneissic banding
igneous / metamorphic
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Igneous/Metamorphic Hybrid
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Rough Corundum (likely Sapphire or Common Corundum)
Aluminum oxide (Al2O3)
mineral
Aventurine
Quartz (Aventurine variety)
Mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine (Silicon dioxide, SiO₂)
Mineral; variety of Quartz