Metamorphic Or Igneous Alteration

Serpentinite pebble

Serpentinite, composed mainly of serpentine-group minerals (commonly antigorite, lizardite, or chrysotile)

Rhodonite-bearing metamorphic rock

Rhodonite (MnSiO₃) with quartz and dark manganese oxides, likely a manganiferous schist or breccia

Polished green banded stone, likely serpentine or altered greenstone

Probable serpentinite/greenstone; commonly dominated by serpentine-group minerals, chlorite, epidote, or actinolite

Nephrite Jade

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

Polished green-and-white jasper (likely ocean jasper or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂) with chlorite, epidote, calcite, and iron-oxide inclusions

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)

Weathered greenstone

Metabasalt (greenstone), likely chlorite–actinolite–epidote rock

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz-rich altered rock, possibly quartz vein with mica

Microcrystalline to coarse quartz (SiO₂) with probable muscovite/biotite mica and iron-oxide staining

Nephrite Jade

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

Feldspar in Matrix

Feldspar group minerals in metamorphic or igneous matrix

Unakite

Epidotized Granite

Quartz-veined dark metamorphic rock

Likely quartz-bearing hornfels, amphibolite, or altered basalt; exact identification requires a fresh surface and tests

Pink Thulite

Thulite (Ca2Al3(SiO4)3(OH)) - Pink Zoisite

Pyrite on Quartz (Fool's Gold in Quartz)

Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)

Tumbled green stone, likely serpentine or nephrite jade

Serpentine-group minerals, commonly antigorite/lizardite; possible nephrite, a jade variety of tremolite–actinolite

Dalmatian Jasper

Microgranular quartz with amphibole/tourmaline inclusions

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Unakite

Epidote with orthoclase feldspar and quartz

Green-and-white marble (likely serpentine-bearing marble)

Calcite- or dolomite-rich marble with green serpentine/chlorite minerals; exact identification requires testing

Dragon Blood Jasper (Dragon Stone / Epidote-Piemontite/Jasper rock)

Epidote with Piemontite / Chalcedony aggregate

Green-tumbled stone, possibly epidote-bearing rock

Undetermined green silicate; possible epidote (Ca₂Al₂Fe³⁺(SiO₄)(Si₂O₇)O(OH)) in a rock matrix

Polished dark green-black stone, likely serpentinite

Serpentinite (serpentine-group minerals; commonly antigorite, lizardite, and chrysotile)

Green Fuchsite and Quartz

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

Nephrite Jade

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

Epidosite

Epidosite (composed mainly of Epidote - {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Nephrite Jade

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

Nephrite Jade

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

Rounded green-gray pebble, possibly serpentinite

Undetermined; appearance is consistent with serpentine-rich rock, but a photograph cannot confirm the mineral identification

Tumbled green serpentine (probable)

Serpentine-group minerals, chiefly antigorite and lizardite; hydrated magnesium silicate, approximately Mg₃Si₂O₅(OH)₄

Tumbled pale-green mineral specimen, likely aventurine or serpentine

Quartzite with fuchsite (aventurine) or serpentine-group mineral; exact identification requires testing

Dyed Magnesite (Howlite imitation)

Magnesium carbonate (MgCO3) with dye

Serpentine

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

Granite / Gneiss (Felsic Metamorphic or Igneous Rock)

Gneiss (or weathered Granite)

Greenish quartz-bearing rock, possibly serpentine or aventurine

Tentatively quartz (SiO₂) with green inclusions; exact identification requires testing

Tumbled rhodonite

Rhodonite, manganese inosilicate (MnSiO₃), commonly with manganese oxides

Greenish chert or serpentine-rich rock

Likely microcrystalline quartz (SiO₂), possibly with chlorite/serpentine inclusions

Stichtite in Serpentinite (Atlantisite)

Mg6Cr2CO16(OH)16·4H2O in Mg3Si2O5(OH)4

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)