Metamorphic (Altered Igneous Rock)

Blue-gray quartz-bearing rock, likely dumortierite quartz or silicified metamorphic rock

Quartz (SiO₂) with probable dumortierite and iron-oxide inclusions

Likely serpentine-rich ultramafic rock

Serpentinite; chiefly serpentine-group minerals (Mg3Si2O5(OH)4), commonly with magnetite and relict olivine/pyroxene

Weathered mica schist (tentative)

Mica schist, likely muscovite–biotite schist with quartz and feldspar

Weathered greenish rock fragment

Tentatively altered basalt or serpentinite; exact identification requires testing

Weathered iron-rich rock, possibly oxidized basalt or laterite

Indeterminate; likely iron-oxide-bearing mafic rock (basaltic composition)

Lapis Lazuli

Lapis lazuli (a rock primarily composed of Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Rounded banded metamorphic cobble, likely greenstone or serpentinite

Probable greenschist-facies metavolcanic rock (chlorite–actinolite schist) or serpentinized ultramafic rock

Quartz-rich rock (possibly quartzite)

Quartzite, composed mainly of quartz (SiO₂)

Dark gray fine-grained stone, likely basalt or andesite

Basalt–andesite volcanic rock; commonly composed of plagioclase, pyroxene, and possibly olivine or magnetite

Smoky Quartz

Silicon Dioxide (SiO2)

Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)

Epidote with Black Hornblende and White Quartz mixture

Weathered basalt (likely vesicular basalt)

Basalt; chiefly plagioclase feldspar, pyroxene, and minor olivine/iron oxides

Iron-rich metamorphic rock (probable limonite/goethite-bearing schist)

Quartz–mica schist with iron oxyhydroxides, chiefly goethite (FeO(OH)) and limonite (amorphous hydrated iron oxides)

Weathered quartz-rich rock, probably granite or granitic gneiss

Granite–gneiss assemblage; chiefly quartz (SiO₂), feldspars, and iron-stained mafic minerals

Weathered metamorphic rock, likely schist or slate

Foliated pelitic metamorphic rock; commonly muscovite–chlorite schist or phyllite

Iron-stained quartz-rich rock

Likely quartz with iron oxides/hydroxides (goethite and/or limonite); exact rock type cannot be determined from the image

Weathered pink-gray granite or granitic gneiss

Felsic granitoid; primarily quartz, K-feldspar, plagioclase, and minor biotite/hornblende

Serpentine-rich rock (possibly lizardite/serpentinite)

Serpentinite, composed chiefly of serpentine-group minerals such as lizardite, antigorite, or chrysotile

Serpentine-rich rock (probable serpentinite)

Serpentinite; predominantly serpentine-group minerals, commonly antigorite, lizardite, or chrysotile, with possible magnetite and carbonate

Likely serpentine-rich rock (serpentinite)

Serpentinite, composed mainly of serpentine-group minerals (e.g., lizardite, antigorite, or chrysotile); exact identification is uncertain from the image alone

Weathered granitic rock

Granite or granodiorite, likely quartz–feldspar–mica aggregate

Weathered metamorphic rock, likely chlorite schist or greenstone

Chlorite-rich schist/greenschist; exact identification requires testing

Serpentinite (serpentinized ultramafic rock)

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), commonly with magnetite, brucite, and relict olivine/pyroxene

Tumbled pale-green stone, possibly serpentine

Indeterminate; appearance is consistent with serpentine-rich rock (serpentine minerals, approximately Mg₃Si₂O₅(OH)₄)

Tumbled granite or granitic gneiss

Quartz–feldspar–mica granitoid; likely biotite granite, possibly foliated gneiss

Weathered brown rock fragment, possibly iron-rich basalt or breccia

Tentatively basaltic rock; exact identification requires testing

Weathered basalt or fine-grained mafic rock

Basalt, likely altered/vesicle-poor tholeiitic basalt; exact identification requires testing

Weathered greenstone

Metamorphosed mafic rock, commonly chlorite–actinolite schist or altered basalt

Greenstone (Metabalt)

Chlorite-actinolite schist (Greenstone)

Unakite-like epidote–feldspar rock

Epidote + K-feldspar/plagioclase ± quartz; compositionally similar to unakite

Lapis Lazuli (in Matrix)

Na8[Al6Si6O24]S2 (Lazurite as the primary component)

Porphyritic volcanic rock (likely basaltic andesite)

Porphyritic basaltic andesite; exact identification requires testing

Likely dark green-black tumbled stone (possibly serpentine)

Unconfirmed; appearance is consistent with serpentine, a group of hydrated magnesium silicate minerals

Greenstone (likely altered basalt or serpentinite)

Chlorite–epidote amphibolite/greenschist or serpentinite; exact identification requires testing

Weathered granite (likely biotite granite)

Granite; interlocking quartz, feldspar, and mica, commonly with biotite

Weathered quartz-rich metamorphic rock, likely quartzite

Quartzite (mostly microcrystalline quartz, SiO₂), possibly altered sandstone

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Pink granite (weathered hand specimen)

Felsic intrusive igneous rock; chiefly quartz, potassium feldspar, plagioclase, and biotite/hornblende

Iridescent quartz-bearing rock, likely bornite/chalcopyrite-bearing quartzite

Quartz (SiO₂) with probable chalcopyrite (CuFeS₂) and/or bornite (Cu₅FeS₄)

Rounded porphyritic volcanic rock, likely andesite or basalt

Porphyritic andesite–basalt; composition commonly plagioclase, pyroxene, and iron-magnesium minerals

Reddish weathered rock, likely iron-rich basalt or jasper

Probable basalt (mafic silicate rock) with hematite/goethite staining; exact identification requires testing

Pink-gray granite

Granite; primarily quartz, potassium feldspar, plagioclase, and biotite/hornblende