Pyrite in Matrix (often with Chalcopyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Category
Mineral (Found In Igneous And Metamorphic Rocks)
Browse mineral (found in igneous and metamorphic rocks) specimens identified by the Rock Identifier community.
Agate (Fortification Agate)
Banded Chalcedony (SiO2)
mineral
Quartzite with Iron Inclusions
Quartzite (largely SiO2) with Hematite/Limonite staining (Fe2O3)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2 with iron impurities)
mineral
Gneiss (specifically a Granitic Gneiss specimen)
Gneiss (high-grade metamorphic rock primarily composed of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
Mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Yellow Quartz Pebble
SiO2 (Silicon Dioxide)
mineral
Biotite Schist
Biotite Schist
metamorphic
Jade (likely Nephrite or Jadeite)
Nephrite (a variety of actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
Metamorphic rock (for Nephrite and some Jadeite); Mineral (for Jadeite)
Pyrite
Iron Disulfide (FeS2)
mineral
Emerald (Tumbled Beryl)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Smoky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Olivine (Peridot)
Olivine (Mg, Fe)2SiO4
mineral
Dumortierite Quartz
Al7(BO3)(SiO4)3O3
mineral
Labradorite
(Ca, Na)(Al, Si)4O8
mineral
Moonstone with Black Tourmaline
Orthoclase (KAlSi3O8) with Schorl inclusions
mineral
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
metamorphic
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Blue Calcite
Calcite (CaCO3)
mineral
Rough Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Quartz Pebble (Iron-Stained)
Quartz (Silicon Dioxide - SiO2)
mineral
Carnelian
Silicon dioxide (SiO2) with iron oxide impurities
mineral
Amygdaloidal Basalt
Amygdaloidal Basalt containing Zeolite or Quartz (SiO2/Silicates)
igneous
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Silicate - (Mn,Fe,Mg,Ca)SiO3)
mineral
Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Fluorite
Fluoride (Calcium Fluoride - CaF2)
mineral
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2)
mineral
Carnelian
Carnelian Agate (Silica: SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Milky Quartz
Silicon dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Shungite
Non-crystalline carbon (allotrope of carbon)
metamorphic
Granite (weathered/river-tumbled)
Granite (Plutonic Igneous Rock)
Igneous Rock
Hematite
Hematite, Iron(III) oxide (Fe2O3)
mineral
Sodalite
Chloric sodium aluminum silicate (Na8(Al6Si6O24)Cl2)
mineral