Sedimentary Rock (Altered)

Red Jasper and Mookaite Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Weathered mica schist (tentative)

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

Greenstone (Amygdaloidal Basalt)

Amygdaloidal Basalt (frequently composed of Plagioclase Feldspar, Pyroxene, and Olivine with Chlorite inclusions)

Tumbled blue-gray stone, likely basalt

Basalt (fine-grained mafic volcanic rock; chiefly plagioclase and pyroxene, commonly with magnetite)

Epidote (or Epidote-rich rock)

Epidote. Mineral formula: Ca2(Al,Fe)3(SiO4)3(OH).

Weathered granite (feldspathic, iron-stained granite)

Granite; primarily quartz, potassium feldspar, plagioclase feldspar, and minor mica/amphibole. Exact identification is uncertain from a single photograph.

Weathered granite pebble

Granite, predominantly quartz–feldspar–mica aggregate

Greenstone / altered basalt (likely serpentinite or chlorite-rich rock)

Chlorite–actinolite schist or weakly metamorphosed basalt; exact identification requires testing

Quartz-bearing conglomeratic rock with orange feldspar/calcite inclusion

Probably porphyritic granite or granitic pegmatite; exact identification requires a thin section or tests

Lapis Lazuli (Low Grade)

Lapis Lazuli (Metamorphic rock containing lazurite, calcite, and pyrite)

Weathered basaltic volcanic rock

Basalt, likely vesicular/amygdaloidal basalt

Tumbled turquoise (likely matrix-bearing)

Turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Lapis Lazuli

Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite

Gossan (Iron Hat)

Iron oxide-rich weathered rock (primarily Limonite and Goethite with secondary Quartz)

Weathered greenstone pebble

Metamorphosed mafic rock, commonly metabasalt or greenschist (exact identification requires testing)

Dark vesicular volcanic rock, likely basalt

Basalt (predominantly plagioclase and pyroxene, with possible olivine and iron oxides)

Epidote (Unakite variety)

Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))

Lapis Lazuli

Lapis Lazuli (A complex rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

Polished fossil shell or bone fragment (tentative)

Indeterminate biogenic carbonate or fossilized bone; possibly a small gastropod/bivalve fragment

Iron-rich rock fragment, possibly weathered hematite-bearing basalt

Likely basalt with iron oxides/hydroxides; composition may include hematite (Fe₂O₃) or goethite (FeO(OH))

Porphyritic Basalt

Porphyritic Mafic Volcanic Rock

Unakite Jasper / Unakite

Altered Granite (containing Epidote, Orthoclase Feldspar, and Quartz)

Weathered quartz-rich rock fragments

Probable granite or granitic gneiss; quartz (SiO₂), feldspar, and mica

Polished labradorite

Labradorite, calcium-sodium feldspar: (Ca,Na)(Al,Si)₄O₈

Likely weathered quartz-bearing rock fragment

Indeterminate granitic or quartz-rich silicate rock; chiefly quartz (SiO₂), possibly feldspar

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Polished brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely brecciated and iron-oxide-rich

Weathered granite or granitic gneiss pebble

Granite; chiefly quartz (SiO₂), feldspar, and mica; possibly weakly gneissic

Weathered quartz-rich pebble

Likely altered granite or granitic gneiss; chiefly quartz and feldspar with minor mica/iron oxides

Weathered, porous limestone (probable fossiliferous limestone)

Calcite-rich limestone; predominantly CaCO₃

Weathered quartz-bearing metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica rock; exact classification is uncertain from the photograph

Weathered copper-bearing rock, likely chrysocolla/azurite-malachite ore

Copper carbonate–silicate mineral assemblage; probable malachite (Cu2CO3(OH)2) with chrysocolla (Cu2−xAlx(H2−xSi2O5)(OH)4·nH2O), possibly limonite and azurite

Orbicular granite (likely larvikite or related granitic rock)

Granite composed mainly of quartz, feldspar, and dark mafic minerals; exact variety is uncertain from the image

Greenstone (Altered Mafic Rock)

Greenschist / Meta-basalt

Weathered porphyritic volcanic rock, likely andesite

Porphyritic andesite; primarily plagioclase feldspar, pyroxene, and possibly amphibole in a fine-grained groundmass

Probable amber fragment

Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)

Porphyritic Basalt (likely artificially dyed or altered)

Basalt with plagioclase phenocrysts (likely treated)

Tumbled amber

Fossilized tree resin; predominantly polymerized diterpenoid resin (succinite when Baltic-type)

Weathered gray rock, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; likely basalt (plagioclase ± pyroxene, possibly altered)

Polished turquoise

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Tumbled turquoise

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Iron-rich meteorite candidate

Unclassified iron meteorite or stony-iron meteorite; confirmation requires chemical and nickel testing