Sedimentary Rock (Altered)

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) CuAl6(PO4)4(OH)8·4H2O

Peridotite

Ultramafic intrusive igneous rock

Likely serpentine

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

Polished orbicular granite (likely larvikite or orbicular diorite)

Quartz/feldspar-bearing granitoid with dark amphibole–biotite minerals; exact variety requires testing

Amethyst Geode

Quartz (Silicon Dioxide, SiO2)

Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)

Quartz–feldspar–mica rock; exact identification requires testing

Biotite mica schist fragment

Biotite-rich mica schist; chiefly biotite K(Mg,Fe)3AlSi3O10(F,OH)2 with quartz and feldspar

Green tumbled stone, possibly serpentine

Likely serpentine-group rock, chiefly serpentine minerals (approx. Mg₃Si₂O₅(OH)₄); identification is uncertain from the photograph.

Tumbled leopard-skin jasper (probable)

Orbicular rhyolite/jasper; primarily microcrystalline quartz (SiO₂) with feldspar and iron-oxide inclusions

Quartz-veined weathered host rock

Quartz (SiO₂) in a likely altered limestone or metamorphic carbonate host

Greenstone (likely serpentinite or altered basalt)

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

Turquoise

Hydrous phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)

Rounded porphyritic volcanic rock, likely andesite or rhyolite

Fine-grained silicate rock; likely plagioclase- and quartz/feldspar-bearing andesite–rhyolite

Rounded greenish stone, likely basalt or metamorphic greenstone

Probable fine-grained mafic rock; possible basalt (plagioclase–pyroxene) or greenschist-facies greenstone

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

Weathered greenstone (metamorphosed mafic rock)

Chlorite- and epidote-bearing metabasalt; exact identification requires examination

Black-and-white spotted jasper (likely dalmatian jasper), polished beads

Commercially called Dalmatian jasper; typically a feldspar-rich rock with dark inclusions, not true jasper (microcrystalline quartz). Exact composition cannot be confirmed from the image.

Iron-stained quartz-rich rock (likely ferruginous quartzite)

Quartz-rich ferruginous rock, probably quartzite with iron-oxide staining (SiO₂ with hematite/goethite)

Green-speckled pebble, likely epidote-bearing basalt or altered granite

Probable epidote (Ca₂(Al,Fe)₃(SiO₄)₃(OH)) in a mafic or felsic host; exact identification requires testing

Orbicular jasper (likely ocean jasper)

Silica-rich chert/jasper, primarily microcrystalline quartz (SiO₂)

Green copper-bearing rock, likely chrysocolla-bearing quartz or host rock

Chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with quartz and copper oxides

Weathered basaltic rock

Basalt, likely altered/vesicular basalt (plagioclase–pyroxene–olivine assemblage)

Greenstone / altered mafic rock

Likely chlorite–actinolite schist or metabasalt; exact identification requires testing

Fossilized bone, likely a large mammal limb bone

Mineralized cortical bone; exact taxon indeterminate from the image

Quartz Vein Rock

Silicon Dioxide (SiO2)

Serpentinite

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

Fossil sea-snail shell

Marine gastropod shell, composed mainly of calcium carbonate (aragonite and/or calcite); species cannot be determined from the image.

Polished mixed rock, likely orbicular/epidote-bearing granite or basalt

Uncertain; probable quartz–feldspar–amphibole/epidote aggregate

Polished jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-stained jasper/chert

Weathered greenish-gray rock fragment, likely serpentinite or chlorite-rich metamorphic rock

Tentative identification: serpentinite (serpentine-group minerals) or chlorite-bearing metamorphic rock; image alone cannot distinguish them reliably

Polished ocean jasper (orbicular jasper)

Silicified rhyolite, composed mainly of microcrystalline quartz (SiO₂)

Greenstone pebble (likely serpentine-rich)

Serpentinite or chlorite-rich metamorphic rock; exact identification is uncertain from the photograph

Unakite

Altered Granite (Epidote, Orthoclase Feldspar, Quartz)

Weathered granite or granitic gneiss

Granite; chiefly quartz, feldspar, and mica

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone

Indeterminate; likely basaltic or ferruginous rock containing iron oxides/hydroxides such as hematite (Fe₂O₃) and limonite/goethite

Weathered metamorphic rock, likely greenschist or amphibolite

Chlorite–actinolite schist/amphibolite; composition likely quartz, feldspar, chlorite, amphibole, and epidote

Weathered iron-rich rock, possibly basalt or ironstone

Likely vesicular basalt or ferruginous breccia; exact identification requires testing

Likely tumbled lepidolite-bearing mica schist

Lepidolite-rich mica schist; chiefly lepidolite/muscovite mica, quartz, and possibly feldspar

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

Weathered quartz-rich metamorphic rock, likely quartzite

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

Banded metamorphic rock (likely gneiss or schist)

Foliated quartz–feldspar–mica rock; exact identification is uncertain from the photograph

Likely weathered quartz-bearing rock

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