Metamorphic Or Igneous Alteration

Nephrite Jade

Tremolite-Actinolite solid solution (Ca2(Mg,Fe)5Si8O22(OH)2)

Fuchsite

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

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Emerald in Matrix

Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6

Milky quartz vein fragment

Quartz (silicon dioxide, SiO₂), massive/microcrystalline variety

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Mica (Biotite or Phlogopite variety)

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

Unakite

Altered Granite (composed of pink orthoclase feldspar, green epidote, and colorless quartz)

Fuchsite Schist

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist

Nephrite Jade

Tremolite-Actinolite series: Ca2(Mg,Fe)5Si8O22(OH)2

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Fuchsite on Quartz

Muscovite (KAl2(AlSi3O10)(OH)2) with Chromium impurities

Dragon Blood Jasper

Microcrystalline Quartz (Chalcedony) with Epidote and Piemontite

Likely basalt (possibly weathered volcanic rock)

Basalt; predominantly plagioclase feldspar and pyroxene, with possible olivine and iron oxides

Unakite

Epidotized Granite

Serpentine

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Fuchsite (Chrome Mica)

K(Al,Cr)2(AlSi3O10)(OH)2

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Lapis Lazuli

Lapis Lazuli (Rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2, Calcite, and Pyrite)

Epidosite (Unakite-related)

Epidosite (composed primarily of Epidote and Quartz)

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

White quartz-rich pebble

Likely quartzite or milky-quartz pebble (SiO₂)

Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)

Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.

Polished greenstone (likely serpentine or altered basalt)

Serpentinite, chiefly serpentine-group minerals; possible chlorite/actinolite-bearing greenstone

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Blue cabochon gemstone ring

Uncertain; likely blue sapphire (corundum, Al₂O₃), blue topaz, or synthetic glass/spinel

Prehnite

Ca2Al(AlSi3O10)(OH)2

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Hematite

Iron(III) oxide (Fe2O3)

Polished gray-white stone, likely serpentinized marble or soapstone

Uncertain; probable serpentinite-bearing carbonate rock, chiefly calcite/dolomite with serpentine and dark accessory minerals

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Massive Quartz with Host Rock

Silicon Dioxide (SiO2)

Polished tiger’s eye

Quartz (microcrystalline SiO₂) with crocidolite-derived iron oxides

Citrine

Silicon Dioxide (Quartz variety), SiO2

Aventurine

Quartz with fuchsite inclusions (SiO2)

Soapstone (Steatite) Carving

Steatite (composed primarily of Talc, Mg3Si4O10(OH)2)

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Soapstone

Steatite (primarily Talc, Mg3Si4O10(OH)2)

Nephrite Jade

Ca2(Mg,Fe)5Si8O22(OH)2 (Calcium magnesium iron silicate hydroxide)

Hematite

Iron(III) oxide (Fe2O3)