Pegmatite
Igneous Pegmatite
igneous
Category
Mineral With Metamorphic Or Igneous Host
Browse mineral with metamorphic or igneous host specimens identified by the Rock Identifier community.
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Tumbled green aventurine
Quartz (SiO₂), typically colored by fuchsite mica inclusions
mineral
Garnet-bearing rock (likely almandine garnet in a metamorphic matrix)
Almandine garnet, Fe₃Al₂(SiO₄)₃; host rock is uncertain from the image
metamorphic
Rock Fragment with Calcite/Quartz Vein
Polymictic Rock Fragment (SiO2 / CaCO3)
igneous
Greenstone
Metabasalt / Chlorite schist
metamorphic
Green Druzy Quartz (Prasiolite)
Silicon Dioxide (SiO2) with inclusions (typically Chlorite or Actinolite)
mineral
Pyrite-bearing rock, likely quartz vein
Pyrite (FeS₂) in quartz-rich host rock
mineral
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Quartz Matrix with Iron Staining / Mica Schist
Silicon Dioxide (SiO2) with Iron Oxide staining
mineral
Greenschist (containing Epidote and Quartz)
Greenschist (Epidote-Chlorite-Actinolite Schist)
metamorphic
Quartz Vein in Matrix (Breccia / Host Rock with Quartz)
Silicon Dioxide (SiO2) in Host Rock Matrix
metamorphic
Polished metallic sulfide-bearing pebble
Likely pyrite-bearing slate, schist, or sulfide-rich ore; exact identification requires testing
mineral
Blue Sapphire
Corundum (Al2O3)
gemstone
Tumbled amethyst
Amethyst, purple variety of quartz (SiO₂)
mineral
Pegmatite
Igneous Pegmatite
igneous
Pegmatite
Igneous Pegmatite
igneous
Pink Sapphire
Corundum (Al2O3 with trace Chromium and Iron)
mineral
Weathered granite (likely with accessory quartz)
Granite; chiefly quartz, K-feldspar, plagioclase, and biotite/hornblende
igneous
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
metamorphic
Quartz with Mica/Schist inclusion
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Banded calcite (likely cave deposit or vein fragment)
Calcite, CaCO₃
mineral
Quartz-veined Metamorphic Pebble
Silicate-rich metamorphic rock with quartz veins (SiO2)
metamorphic
Milky Quartz (Common Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Native Copper in Basalt
Cuprum (with Host Basalt)
igneous
Granitoid Gneiss with Feldspar Vein
Gneiss (High-grade Metamorphic Rock) with Potassium Feldspar (KAlSi3O8)
metamorphic
Tumbled Black Tourmaline
Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Green Aventurine (or Xiuyan Jade / Serpentine)
Silicon Dioxide (SiO2) with Fuchsite inclusions or Magnesium Silicate
metamorphic
Quartz crystal
Quartz (silicon dioxide, SiO₂), likely a natural or lightly damaged crystal
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Diopside (likely Chromian Diopside)
Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.
mineral
Pink Feldspar / Rhodochrosite (Tumbled Pink Quartzite)
SiO2 (Quartz) / KAlSi3O8 (Potassium Feldspar)
mineral
Emerald
Beryl (Be₃Al₂(SiO₃)₆) with Chromium or Vanadium impurities
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Yellow Sapphire
Corundum (Al2O3:Fe)
gemstone
Tumbled smoky quartz (probable)
Quartz, silicon dioxide (SiO₂), smoky variety
mineral
Diamond and Sapphire
Carbon (Diamond, C) and Aluminum Oxide (Sapphire, Al2O3)
gemstone
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
Mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz vein in dark metamorphic rock
Likely quartz-rich vein cutting a biotite- or amphibole-rich metamorphic host; exact host rock cannot be confirmed from the image
metamorphic
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral