Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic
Browse metamorphic specimens identified by the Rock Identifier community.
Learn about Metamorphic in the encyclopedia
View all →
Slate
Foliated low-grade metamorphic rock
metamorphic
Black tourmaline (schorl), possibly rough
Schorl tourmaline, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Tumbled ruby-bearing corundum (probable)
Corundum, aluminum oxide (Al₂O₃), colored red by chromium; possibly ruby
gemstone
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Rhodonite
Rhodonite (MnSiO3)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate - (Mn,Fe,Mg,Ca)SiO3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz-rich rock, possibly milky quartz or quartzite
Quartz (SiO₂); if quartzite, recrystallized quartz sandstone
metamorphic
Likely quartz-rich stone (possibly milky quartz or quartzite)
Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present
mineral
Dark gray metamorphic rock fragment
Likely slate or fine-grained schist; mineral composition cannot be confirmed from the image
metamorphic
Banded gneiss pebble
Gneiss, likely quartz–feldspar–mica gneiss
metamorphic
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Greenstone
Metamorphic Greenstone (Greenschist facies)
metamorphic
Pyrite Schist
Metamorphic rock containing FeS2 (Pyrite) with mica and quartz
metamorphic
Greenschist
Greenschist (containing Chlorite, Epidote, and Actinolite)
metamorphic
Eclogite
Eclogite (Omphacite-Garnet Rock)
metamorphic
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Fuchsite
Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Tumbled quartz-rich pebble
Microcrystalline quartz (SiO₂), possibly milky quartz or chalcedony
mineral
Milky quartz (iron-stained quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Polished ruby-in-fuchsite (tentative)
Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist
metamorphic
Tiger's Eye
Silicon dioxide (SiO2) with fibrous inclusions of crocidolite
Mineral
Ruby in Zoisite (Anyolite) or Tumbled Dyed Agate/Quartzite
Zoisite with Corundum (Al2O3 + Ca2Al3(SiO4)3(OH))
metamorphic
Zoisite with Rubellite (Ruby in Zoisite)
Zoisite with inclusions of Hornblende (Anyolite)
metamorphic
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
metamorphic
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 in SiO2
Metamorphic Rock / Mineral Association
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Schist
Schist (Foliated Metamorphic Rock)
metamorphic
Quartz-Veined Slate or Greenstone
Metamorphic rock with quartz vein (SiO2)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite/Biotite Schist)
metamorphic
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Epidote
Calcium aluminum iron silicate hydroxide (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Feldspar (Plagioclase / Potassium Feldspar)
Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Epidote in Matrix (likely Amphibolite or Gneiss)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Metamorphic Matrix
metamorphic
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide inclusions
mineral