Metamorphic (Altered Igneous Rock)

Unakite (often traded as Dragon Blood Jasper)

Epidotized Granite

Epidote-bearing Rock

Epidote / Silicate mineral aggregate

Uncertain green-brown mineral fragment

Possibly epidote, chlorite, or altered amphibole; exact identification requires testing

Greenstone or Epidote-rich rock

Epidote or Chlorite schist/greenstone

Pale greenish quartz-bearing rock, possibly serpentine or altered feldspar

Tentatively serpentinite-related rock (serpentine-group minerals) or altered granitic material; identification is uncertain from the photograph

Unakite

Epidotized Granite

Epidote with Quartz/Feldspar

Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock

Dark, coarse-grained rock (possibly diorite or amphibolite)

Undetermined; likely a mafic to intermediate rock containing plagioclase and dark amphibole or pyroxene

Epidote

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

Quartz with Epidote

Silicon dioxide (SiO2) with Calcium aluminum iron silicate (Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))

Weathered quartz-bearing rock, possibly calcite vein fragment

Indeterminate; likely quartz (SiO₂) with carbonate minerals such as calcite (CaCO₃)

Likely mica-rich metamorphic rock (schist)

Mica schist, probably biotite–muscovite schist; exact identification requires closer examination

Lapis Lazuli

Lapis Lazuli (Metamorphic Rock containing Lazurite, Calcite, Pyrite, and Sodalite)

Green Greenstone / Celadonite-bearing Metamorphic Rock

Greenschist / Celadonite / Serpentinitic pebble

Unakite

Altered Granite (Epidotized Granite)

Unakite

Epidotized Granite

Tumbled banded gneiss or amphibolite

Banded metamorphic rock, likely quartz–feldspar–biotite gneiss with amphibole

Greenstone pebble

Likely chlorite- and/or actinolite-bearing metamorphic rock; exact composition cannot be determined from the image.

Greenstone / Serpentinite

Serpentine-group / Altered Mafic Rock

Blue-gray quartz-rich rock, possibly blue aventurine or sodalite-bearing stone

Probable quartz–feldspar aggregate; exact identification requires testing

Weathered basaltic rock

Basalt, likely amygdaloidal or altered basalt

Greenstone (likely altered mafic rock)

Chlorite- and amphibole-bearing metabasalt; exact identification requires testing

Greenstone (Epidosite)

Epidosite (Metamorphosed Basalt/Diabase)

Greenstone (likely chlorite-rich metamorphic rock)

Greenschist; commonly composed of chlorite, actinolite, and epidote, with possible albite

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Yellow Quartz (Citrine / Milky Quartz)

Silicon Dioxide (SiO2)

Likely weathered blue-gray basalt

Basalt, a fine-grained mafic volcanic rock; commonly plagioclase + pyroxene ± olivine and iron oxides

Iron-stained quartz-bearing rock, possibly weathered granite or gneiss

Quartz–feldspar rock with iron-oxide staining; exact identification requires testing

Unakite

Altered Granite (Epidotized Granite)

Dark weathered metamorphic rock, likely schist or phyllite

Undetermined; probably mica-rich quartz–feldspar schist/phyllite

Iron-stained quartz-rich rock, possibly weathered granite or quartzite

Uncertain from image; likely quartz (SiO₂) with feldspar and iron-oxide staining

Epidote

Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH))

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica metamorphic rock; exact identification requires a fresh surface and tests

Greenstone / Epidosite

Metamorphosed Mafic Igneous Rock (Epidote-Chlorite group)

Quartz-rich breccia or quartz vein fragment

Silica, primarily quartz (SiO₂), with possible chlorite, feldspar, or iron-oxide inclusions

Greenstone / Greenschist

Greenschist (composed of Chlorite, Epidote, Actinolite)

Likely mica schist

Mica-rich schist, probably muscovite–biotite schist

Epidotite (Unakite-related Epidote)

Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH))

Fossilized bivalve shell or shell-rich limestone

Likely an indeterminate fossil mollusk; calcite/aragonite (CaCO₃), possibly preserved in limestone

Weathered quartz-rich metamorphic rock, possibly gneiss or quartzite

Quartz–feldspar–mica metamorphic aggregate; exact identification requires testing

Unidentified gray-green crystalline rock

Possibly chlorite schist or altered amphibolite; image alone is insufficient for definitive identification