Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
metamorphic
Category
Mineral, Sediment
Browse mineral, sediment specimens identified by the Rock Identifier community.
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining and Matrix
Silicon Dioxide (SiO2)
mineral
Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Mineral
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Schist
Mica Schist (primarily Muscovite and Biotite)
metamorphic
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Native Sulfur
Sulfur (S8)
mineral
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous
Quartz / Quartzite
Silicon Dioxide (SiO2)
Metamorphic or Mineral
Pearl (nacre)
Calcium Carbonate (mostly CaCO3 as Aragonite) and Conchiolin
Organic Mineraloid
Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Basalt
Mafic Igneous Rock (primarily Plagioclase and Pyroxene)
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Sandstone
Arenite (composed mainly of SiO2)
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Epidote
Epidote - Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Pegmatite
Granitic Pegmatite
igneous
Gneiss
Gneiss
metamorphic
Schist
Schist (Crystalline metamorphic rock)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Amygdaloidal Basalt
Amygdaloidal Basalt (containing secondary minerals like Quartz, Zeolites, or Calcite)
igneous
Schist with Quartz/Mica
Mica Schist (primarily Muscovite and Quartz)
Metamorphic
Diamond in Kimberlite
Kimberlite host rock with C (Carbon) inclusion
igneous
Gneiss
Gneiss
metamorphic
Granite
Granite
igneous
Banded Gneiss
Gneiss
metamorphic
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
Yellow Quartz or Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst (Chevron Amethyst)
Amethystine Quartz (SiO2)
mineral