Mineral (Metamorphic Pseudomorph)

Greenschist

Chlorite-actinolite schist

Kyanite (in Schist Matrix)

Kyanite (Al2SiO5)

Talc (Soapstone variety)

Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2

Quartz (Yellow/Citrine Variety)

Silicon Dioxide (SiO2)

Amazonite

Microcline (K(AlSi3O8))

Quartz with Schorl inclusions

Silicon Dioxide (SiO2) with Sodium Iron Aluminum Borosilicate Hydroxide (Black Tourmaline)

Corundum (variety Ruby/Sapphire)

Aluminum Oxide (Al2O3)

Potassium Feldspar

Orthoclase (KAlSi3O8)

Banded gneiss

Gneiss, typically quartz–feldspar–mica assemblage

Talc Schist / Soapstone

Talc (Mg3Si4O10(OH)2)

Greenschist

Greenschist (Chlorite-actinolite schist)

Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)

Quartz variety (SiO2) / Polycrystalline Quartz Aggregate

Rock crystal quartz fragment

Quartz (silicon dioxide, SiO₂)

Quartz (Milky or Smoky Quartz Pebble)

Silicon Dioxide (SiO2)

Potassium Feldspar (Orthoclase / Microcline)

KAlSi3O8 (Potassium Aluminum Silicate)

Quartzite River Rock with Dendrites

Metamorphosed Quartz-rich Sandstone with Manganese Oxide (MnO2) inclusions

Biotite Mica

K(Mg, Fe)3AlSi3O10(F, OH)2

Ruby (Raw Corundum)

Corundum (Al2O3) with Chromium traces

Quartz Vein

Silicon Dioxide (SiO2)

Garnet amphibolite / Metamorphic Rock

Garnet Amphibolite (Hornblende - Almandine schist/gneiss)

Sapphire

Corundum (Al2O3)

Sphalerite

Zinc Sulfide (ZnS)

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Schist

Mica Schist

Epidosite (Epidote-rich rock)

Epidotalite (primarily Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH))

Epidote (with Quartz and Feldspar)

Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)

Blue Quartz

Quartz (Silicon Dioxide) with inclusions, SiO2

Greenstone / Epidosite

Epidosite (primary minerals: Epidote and Quartz)

Galena with Pyrite

Lead Sulfide (PbS) associated with Iron Sulfide (FeS2)

Rhodonite

Manganese Inosilicate (MnSiO3)

Gneiss with Iron Staining and Sulfide Mineralization

Metamorphic Gneiss / Amphibolite with Iron/Sulfide Oxidation

Gneiss

Feldspar–quartz–mica gneiss, locally amphibole-bearing

Quartzite

Quartzite (SiO2)

Prehnite

Ca2Al(AlSi3O10)(OH)2

Pyrite (or Arsenopyrite / Ore mineral aggregate)

FeS2 (Iron Sulfide)

Green Schist

Greenschist (composed of chlorite, epidote, and actinolite)

Fuchsite

Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2

Ruby (Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Iolite (Cordierite)

Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18

Mica (Biotite or Phlogopite variety)

Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)

Gneiss

Metamorphic Gneiss

Gneiss

Metamorphic Foliated Gneiss