Metamorphic (Altered Igneous Rock)

Likely rhyolite or altered volcanic rock

Fine-grained felsic volcanic rock, probably rhyolite; exact identification is uncertain from the image

Rounded pale beach cobble, likely quartzite or massive quartz

Quartzite (mostly microcrystalline SiO₂); exact identification requires testing

Likely weathered basalt or andesite fragment

Fine-grained volcanic rock, likely basaltic-andesite; exact identification requires testing

Weathered granite or granitic gneiss fragment

Granite; chiefly quartz (SiO₂), feldspar, and mica, with iron-oxide weathering

Drill-core rock, likely foliated metamorphic rock

Indeterminate from the photograph; possibly slate, phyllite, or schist

Tumbled brown river stone

Likely weathered iron-rich basalt, greenstone, or other mafic metamorphic rock; exact identification requires testing

Citrine Geode Fragment

Citrine (Silicon Dioxide with Iron Impurities), SiO2

Quartz vein rock (milky quartz)

Milky quartz, SiO₂; likely quartz-rich vein material in altered host rock

Greenstone pebble (likely altered basalt)

Chlorite–actinolite–epidote altered basalt; precise identification requires testing

Green Aventurine (or Jadeite/Nephrite Jade)

SiO2 (Silicon Dioxide) - Aventurine Quartz

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Milky quartz in weathered host rock

Quartz, silicon dioxide (SiO₂), likely occurring in altered igneous or metamorphic matrix

Iron-stained quartzite or quartz-rich metamorphic rock

Quartzite, predominantly crystalline SiO₂, with iron-oxide minerals (hematite/goethite)

Unakite

Unakite (metamorphosed granite)

Unakite

Unakite (Epidotized Granite)

Likely tumbled basalt or dark river stone

Basalt; predominantly plagioclase and pyroxene, possibly with olivine

Weathered greenstone (probable)

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

Rounded yellow-green pebble, likely serpentine or quartzite

Provisional: serpentinite/serpentine-rich rock; alternatively iron-stained quartzite

Greenstone (likely altered basalt or greenschist)

Greenschist-facies mafic rock; commonly chlorite–actinolite–albite ± epidote, or chlorite-altered basalt

Tumbled green-brown stone, likely serpentine

Serpentinite; chiefly serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite

Greenstone / altered mafic rock

Likely chlorite–epidote–actinolite schist or altered basalt (greenstone); exact identification requires thin-section or chemical testing.

Biotite Mica

K(Mg,Fe)3AlSi3O10(OH)2

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Likely serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg₃Si₂O₅(OH)₄

Greenstone Porphyry

Altered Porphyritic Andesite/Basalt

Ruby (Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Weathered mica-rich rock (tentative identification)

Possibly mica schist or phyllite; exact identification requires closer examination

Likely weathered quartz-bearing rock

Probably quartz-rich pegmatite or altered feldspathic rock; exact identification is uncertain from the image

Dragon Blood Jasper

Epidote-rich Quartzite (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))

Greenstone (likely serpentinite or altered basalt)

Serpentinite, predominantly serpentine-group minerals (Mg₃Si₂O₅(OH)₄); possibly chlorite- or actinolite-rich greenschist

Unidentified gray-green rock, possibly serpentinite or altered basalt

Tentatively serpentinite (serpentine-group minerals), but identification is uncertain from the blurred image

Likely mafic metamorphic rock with sulfide mineralization

Probable amphibolite or hornblende–biotite schist, locally bearing pyrite/other sulfides

Greenstone

Metabasalts and metavolcanics

Unakite

Epidotized Granite

Serpentine-rich serpentinite

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

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Likely hornblende amphibolite fragment

Amphibolite, chiefly hornblende and plagioclase feldspar

Likely serpentinite (green serpentine rock)

Serpentinite, composed chiefly of serpentine-group minerals (antigorite, lizardite, and/or chrysotile)

Smoky Quartz with Inclusions

Silicon Dioxide (SiO2)

Unakite

Altered Granite (Orthoclase + Epidote + Quartz)

Weathered feldspar-rich rock, possibly amazonite-bearing granite

Likely granite or pegmatite containing microcline feldspar (KAlSi₃O₈), with quartz and altered minerals

Weathered mafic rock, likely basalt

Basalt; primarily plagioclase feldspar, pyroxene, and minor olivine or iron oxides