Metamorphic Or Igneous Alteration

Serpentinite

Serpentinite (complex silicate mineral group (Mg,Fe)3Si2O5(OH)4)

Gold-bearing quartz (quartz with visible native gold)

Quartz (SiO₂) with native gold (Au)

Soapstone Carving

Steatite

Nephrite Jade

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

Nephrite Jade

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

Tumbled brown stone, likely basalt or iron-stained quartzite

Indeterminate from photograph; possible basalt (mafic silicate rock) or quartzite (SiO₂)

Serpentinite

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

Jasper with Epidote

Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate Hydrate

Rounded pale-green pebble, likely serpentinite or altered basalt

Probable serpentinite (serpentine-group minerals) or weathered mafic rock; exact identification requires testing

Likely basaltic rock or mafic metamorphic specimen

Basalt, possibly altered to amphibolite/greenstone; chiefly plagioclase and pyroxene, with possible chlorite, amphibole, and iron oxides

Unakite

Altered Granite (Granitic Metamorphic Rock)

Unakite

Epidotized Granite

Weathered quartz-bearing metamorphic rock

Likely quartz–feldspar schist or gneiss, possibly with iron-oxide alteration

Emerald in Matrix

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

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.

Milky quartz vein fragment

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

Likely basalt (possibly weathered volcanic rock)

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

Mica (Biotite or Phlogopite variety)

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

Tumbled yellow-green stone, likely serpentine or nephrite jade

Serpentine-group mineral, commonly antigorite/lizardite; possible nephrite, a tremolite–actinolite amphibole aggregate

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Vesicular volcanic rock, likely weathered pumice or scoria

Pumice/scoria; predominantly volcanic glass and feldspar, with possible iron oxides

Milky quartz vein rock

Quartz (SiO₂), likely in a quartz-rich host rock with minor iron-stained minerals

Bull Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Weathered granitic or metamorphic rock fragment

Indeterminate; likely quartz–feldspar–mica-bearing granitoid or gneiss

Pistachio-green and dark mineral-bearing rock, possibly serpentine with dark inclusions

Undetermined; the image is insufficient for reliable species-level identification

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Fuchsite

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

Nephrite Jade

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

Epidote

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

White quartz-rich pebble

Likely quartzite or milky-quartz pebble (SiO₂)

Weathered quartz-rich metamorphic rock (likely gneiss or quartzite)

Quartz (SiO₂) with probable feldspar, mica, and iron-oxide alteration

Blue cabochon gemstone ring

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

Serpentine

Serpentine subgroup (Mg3Si2O5(OH)4)

Anthracite Coal

Anthracite (Carbon rank grade)

Dragon Blood Jasper

Epidote with Pietersite or Red Jasper (Silicate mineral)

White Jade (Nephrite)

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

Serpentine

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

Nephrite Jade

Nephrite (a variety of the amphibole series: Actinolite-Tremolite) Ca2(Mg,Fe)5Si8O22(OH)2

Nephrite Jade

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

Nephrite Jade

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

Likely chlorite schist or altered mafic rock

Chlorite–actinolite schist; commonly composed of chlorite, actinolite/amphibole, epidote, and albite

Unakite

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