Schist (Greenschist / Mica Schist)
Schist (variable mineral composition, commonly containing quartz, feldspar, mica, chlorite)
metamorphic
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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Quartz in Matrix (Lepidolite or Quartzite)
Silicon Dioxide (SiO2) with host rock
mineral
Prehnite
Prehnite Ca2Al2Si3O10(OH)2
mineral
Quartz-rich rock, possibly quartz vein material
Likely milky quartz with iron-stained or weathered host rock; exact identification is uncertain from the photo
igneous
Green Quartz (Prasiolite)
Silicon Dioxide (SiO2)
mineral
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
mineral
Ruby (mounted cabochon)
Corundum, Al₂O₃; red color typically from chromium
gemstone
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Veined Limestone (or Quartz-Veined Slate/Shale)
Metamorphosed Sedimentary Rock with Calcite/Quartz Veins
metamorphic
Quartz-rich pegmatite, possibly with mica and feldspar
Granitic pegmatite; mainly quartz (SiO₂), feldspar, and biotite/muscovite mica
igneous
Milky quartz-bearing rock
Quartz, silicon dioxide (SiO₂), likely massive milky quartz in a host rock
mineral
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (rough quartz crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Iron-stained quartz-rich rock, possibly gold-bearing quartz
Quartz (SiO₂) with iron-oxide staining; possible limonite/goethite matrix
mineral
Milky quartz (rough quartz chunk)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz with dark inclusions
Quartz, silicon dioxide (SiO₂), likely included or milky quartz
mineral
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky quartz with iron-oxide staining
Quartz (SiO₂), likely with goethite/limonite coatings
mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Blue Sapphire (Raw)
Corundum (Al2O3)
mineral
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Muscovite Mica (likely on Quartz/Feldspar)
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Milk Quartz (White) and Yellow Aventurine (Yellow)
Silicon Dioxide (SiO2)
mineral
Chrysotile Serpentine (Asbestos in Matrix)
Chrysotile Mg3Si2O5(OH)4
metamorphic
Milky quartz / quartz vein fragment
Quartz, silicon dioxide (SiO₂)
mineral
Yellow Sapphire
Corundum (Al2O3)
gemstone
Yellow Sapphire
Corundum (Al2O3)
gemstone
Tumbled Ruby
Corundum (Al2O3:Cr)
gemstone
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Ruby / Red Tourmaline
Corundum (Al2O3) or Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4)
mineral
Star Ruby
Corundum (Al2O3 with chromium and rutile inclusions)
mineral
Orange chromium diopside (likely tumbled)
Diopside, CaMgSi₂O₆; orange color may reflect iron-rich composition or surface treatment/inclusion
mineral
Pyritic Gneiss (with Garnet)
Gneiss containing Pyrite (FeS2) and Almandine Garnet (Fe3Al2(SiO4)3)
metamorphic
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
mineral
Small quartz-rich pebble or rock fragment
Quartz (silicon dioxide, SiO₂), possibly with iron-oxide staining or host-rock inclusions
mineral
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
metamorphic
Milky quartz vein rock
Quartz, silicon dioxide (SiO₂), likely massive vein quartz with iron-oxide staining
mineral
Raw purple fluorite crystal (tentative)
Fluorite, calcium fluoride (CaF₂)
mineral
Greenstone
Metamorphic Rock (Greenschist facies)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2) within a sedimentary or igneous host
sedimentary