Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Category
Browse mineral with metamorphic or igneous host specimens identified by the Rock Identifier community.
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine/Lemon Quartz)
Silicon Dioxide (SiO2)
Smoky Quartz on Matrix
Crystalline Silicon Dioxide (SiO2)
Ferruginous Quartz
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
Quartz
Quartz (SiO₂)
Quartz
Quartz (Silicon Dioxide, SiO2)
Amethyst
Amethyst (variety of Quartz, SiO2)
Quartz Sand Grain
Silicon Dioxide (SiO2)
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Olivine (often within Peridotite)
Magnesium iron silicate, (Mg,Fe)2SiO4
Magnetite (Lodestone variant)
Magnetite (Fe3O4)
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Ruby (in costume jewelry context)
Corundum (Al2O3) with Chromium impurities
Milky Quartz Mushroom Carving
Quartz (Silicon Dioxide, SiO2)
Ruby
Corundum (Al2O3)
Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
Magnetic Hematite (Man-made)
Iron Oxide (Fe2O3) with Barium-Strontium Ferrite
Smoky Quartz (with possible Feldspar inclusions)
Silicon Dioxide (SiO2)
Garnet (likely Almandine)
Almandine (Fe3Al2(SiO4)3)
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
Chert (Common Opal/Chalcedony)
Microcrystalline Quartz (SiO2)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Greenstone
Greenschist
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
Quartz on Chlorite Schist
Chlorite Schist (Mg,Fe)3(Si,Al)4O10(OH)2 with Quartz (SiO2)
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Gold Nugget
Native Gold (Au)
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
Greenstone
Greenschist / Meta-basalt
Chert / Flint Conglomerate
Silicified Sedimentary Breccia (primarily SiO2)
Banded Gneiss
Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)
Lapis Lazuli (Lazurite crystals on Marble)
Lazurite / (Na,Ca)8[(S,Cl,SO4,OH)2|(AlSiO4)6]
Banded Gneiss
Gneiss
Gneiss
Gneiss
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Clear Quartz (or Rock Crystal)
Quartz (SiO₂ - Silicon Dioxide)