Metamorphic Or Igneous Alteration

Serpentinite

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

Serpentinite

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

Raw greenish mica-rich mineral specimen

Likely muscovite mica with quartz or feldspar inclusions; exact identification requires testing

River Cobble (likely Basalt or Greenstone)

Mafic Igneous Rock (with possible chloritic alteration)

Polished green serpentine (likely antigorite-rich)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible chlorite, magnetite, and talc

Basalt with Epidote (Greenstone)

Epidote-bearing Metabasalt

Moss Agate

Silicon Dioxide (Chalcedony variety) with green hornblende or chlorite inclusions - SiO2

Tumbled dark green stone, likely serpentine or nephrite jade

Serpentine-group minerals, chiefly antigorite/lizardite; possibly nephrite, an aggregate of tremolite–actinolite

Noble Serpentine

Antigorite (Mg3Si2O5(OH)4)

Polished mixed rock, likely orbicular/epidote-bearing granite or basalt

Uncertain; probable quartz–feldspar–amphibole/epidote aggregate

Unakite (likely)

Epidote–K-feldspar–quartz aggregate; epidote: Ca₂(Al,Fe³⁺)₃Si₃O₁₂(OH)

Unakite

Epidote–K-feldspar–quartz granitoid (often called unakite)

Nephrite Jade

Ca2(Mg, Fe)5Si8O22(OH)2 (Magnesium-rich Tremolite-Actinolite)

Tumbled blue-green stone, likely aventurine or serpentine

Quartz-rich aventurine (SiO₂) or serpentine-group mineral; exact identification requires testing

Tiger's Eye

Quartz pseudomorph after Crocidolite (SiO2 with Fe oxide inclusions)

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg3Si2O5(OH)4)

Serpentine

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

Serpentinite

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

Serpentinite

Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)

Unakite

Unakite (altered granite)

Unakite (likely), tumbled specimens

Unakite: epidote + pink potassium feldspar + quartz; composition varies and may include chlorite

Greenstone cabochon

Likely serpentinite or chlorite-rich greenschist; exact identification requires testing

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Granite / Gneiss (Felsic Metamorphic or Igneous Rock)

Gneiss (or weathered Granite)

Likely weathered feldspar-rich stone

Feldspar, probably microcline or orthoclase (KAlSi₃O₈), possibly altered pegmatite material

Serpentine

(Mg,Fe)3Si2O5(OH)4

Unakite

Altered Granite (Epidotized Granite)

Serpentinite

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

Serpentine

Antigorite, Lizardite, or Chrysotile; (Mg, Fe)3Si2O5(OH)4

Serpentine-rich ultramafic rock

Serpentinite (predominantly serpentine-group minerals: lizardite, chrysotile, and/or antigorite)

Greenstone (likely serpentinite or greenstone pebble)

Serpentinite-rich ultramafic rock; commonly dominated by serpentine-group minerals, with possible chlorite, actinolite, or magnetite

Unakite

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

Epidosite with Quartz (Unakite-variant or Jasper)

Epidotized Metasomatite

Rhodonite

Manganese Inosilicate (MnSiO3), often with Ca, Fe, Mg, Zn

Leopard Skin Jasper

Silicon Dioxide (SiO2) with impurities

Epidote in Basalt

Epidotized Basalt (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH) in Mafic Igneous Host)

Granitoid (with Epidote and Orthoclase)

Crystalline Felsic Intrusive Rock (containing SiO2, KAlSi3O8, and Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH))

Polished serpentine-rich rock (likely serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chlorite, and carbonate

Serpentinite (serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chlorite, and talc

Tumbled greenstone, likely nephrite jade

Nephrite jade (interlocking tremolite–actinolite amphibole; Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂)

Polished blue-green stone, likely serpentine or chrysocolla-bearing rock

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄; exact identification requires testing

Jade

There are two distinct minerals classified as Jade: Jadeite (Na(Al,Fe3+)Si2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the image showing translucent, somewhat fibrous material, it is likely Nephrite.