Metamorphic (Low Grade)

Porphyritic Andesite or Basalt

Porphyritic Intermediate/Mafic Igneous Rock

Phyllite (possibly low-grade greenish slate)

Foliated metamorphic rock composed mainly of very fine-grained quartz, mica, and chlorite; approximate composition varies and has no single fixed chemical formula

Epidote in Matrix (Unakite-related)

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

Ruby (Raw Corundum)

Corundum (Al2O3) with Chromium traces

Epidote

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

Greenstone

Metamorphic Rock (Greenschist facies)

Graphitic schist (likely carbonaceous slate)

Graphite-bearing pelitic schist; mainly quartz, mica, feldspar, and graphite

Tumbled lapis lazuli

Lazurite-bearing calcite rock; lazurite approximately Na₃Ca(Si₃Al₃)O₁₂S

Greenstone pebble (identification uncertain from photo)

Greenstone, typically metamorphosed mafic rock composed of chlorite, actinolite, and epidote

Epidote

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

Weathered quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if metamorphic

Greenstone (Greenschist)

Greenschist facies rock (containing chlorite, epidote, actinolite)

Jade Bangle (Jadeite)

Jadeite, NaAlSi2O6

Green Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Nephrite Jade

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

Rounded gray-green pebble, likely basaltic or metamorphic

Indeterminate mafic rock; possibly basalt, diabase, or greenstone

Prehnite

Prehnite - Ca2Al(AlSi3O10)(OH)2

Schist

Metamorphic Schist

Greenstone (likely chlorite-rich metamorphic rock)

Chlorite-bearing greenschist; exact identification requires testing

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)

Raw Emerald (Emerald Beryl)

Beryl (Be3Al2Si6O18) with chromium/vanadium impurities

Dark gray metamorphic pebble, likely slate or phyllite

Slate/phyllite; chiefly fine-grained quartz, mica, and clay-derived minerals

Greenschist

Greenschist (Chlorite-actinolite schist)

Greenstone (Greywacke or Nephrite Jade variant)

Metamorphosed mafic igneous or sedimentary rock (e.g., Actinolite-Chlorite Schist)

Weathered iron-rich rock, likely shale or slate

Probably ferruginous shale (iron-oxide-stained mudstone); exact identification requires testing

Epidote

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

Phyllite

Phyllite

Corundum (Ruby/Sapphire crystal)

Al2O3 (Aluminum Oxide)

Jadeite (Jade Ring)

NaAlSi2O6 (Sodium Aluminum Silicate)

Pink-and-white quartz-rich pebble

Quartz (SiO₂), likely massive quartz with iron-oxide staining and possible feldspar inclusions

Greenschist

Chlorite schist

Red-and-black slate

Slate, a fine-grained metamorphic rock composed mainly of clay-derived mica minerals and quartz

Jadeite

Jadeite (NaAlSi2O6)

Epidote

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

Weathered greenstone (probable)

Greenstone; likely altered mafic rock composed chiefly of chlorite, epidote, and albite

Banded Slate Pebble

Metamorphosed Mudstone / Slate

Serpentine

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

Jadeite

NaAlSi2O6

Jade (Nephrite)

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

Green Jadeite

Jadeite, NaAl(Si2O6)

Greenstone

Metabasalt

Likely altered volcanic rock (greenstone)

Chlorite–epidote–actinolite-rich metavolcanic rock; exact identification requires testing