Not A Rock (Man Made Origin)

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Weathered granite fragment

Granite, chiefly quartz (SiO₂), feldspar, and mica

Quartz (Druzy)

Silicon Dioxide (SiO2)

Granite

Granite (Plutonic Igneous Rock)

Weathered quartz-rich rock, likely granite or granitic gneiss

Granite/granitic gneiss; chiefly quartz (SiO₂), feldspar, and dark mica or amphibole

Rounded dark-gray cobble, likely basalt

Basalt (fine-grained mafic volcanic rock; identification is provisional from the image)

Turquoise cabochon pendant

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

Quartz (Milky / Clear Quartz Fragment)

Silicon Dioxide (SiO2)

Inukshuk Rock Sculpture (composed of Granite, Slate, and Amethyst)

Silicon Dioxide (Amethyst portion, SiO2) with mixed silicate rock assemblage

Granodiorite

Phaneritic Plutonic Rock (Granodiorite)

Quartz (Water-worn Pebble)

Silicon Dioxide (SiO2)

Quartz (Milky/Rose Quartz)

Silicon Dioxide (SiO2)

Pink feldspar-rich granite

Granite, composed chiefly of quartz, potassium feldspar, and plagioclase, with minor mica or other minerals

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Possible green tourmaline (small rough crystal fragment)

Possibly elbaite, Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₄; identification is uncertain from the blurry image

Water-worn brown stone, likely basalt or chert

Indeterminate; possible fine-grained basalt (plagioclase–pyroxene) or ferruginous chert (microcrystalline SiO₂)

Black beach pebble (likely basalt)

Fine-grained basalt; exact identification cannot be confirmed from the image

Weathered iron-rich rock, possibly ironstone or altered basalt

Indeterminate; likely ferruginous basalt/ironstone containing hematite-goethite and silicate minerals

Likely greenstone (metamorphosed basalt)

Metabasalt; commonly composed of chlorite, actinolite, epidote, and albite

Lava Rock (Dyed)

Basalt / Volcanic scoria

Granite

Felsic intrusive igneous rock

Pumice

Pumice (Vitreous volcanic rock)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Iron Slag

Anthropogenic Iron Silicate

Possible black tourmaline (schorl)

Schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Possible basaltic rock or meteorite candidate

Likely vesicular basalt; meteorite identification cannot be confirmed visually

Brown chert (flint)

Microcrystalline quartz (SiO₂), commonly called chert; the specimen may be iron-stained

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Sea Glass

Amorphous Silica (Glass) SiO2

Druzy quartz on matrix

Quartz (SiO₂), microcrystalline crystal coating

Green serpentine (likely serpentine-rich stone)

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

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Granite Pebble

Granite (Plutonic Igneous Rock)

Milky quartz

Quartz (SiO₂)

Quartz (Chert/Chalcedony variety)

Silicon Dioxide (SiO2)

Black-and-white patterned stone, possibly zebra marble

Uncertain from the image; likely calcite marble with dark mineral veining or inclusions

Small green-gray pebble (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Granite

Phaneritic Felsic/Intermediate Igneous Rock

Grey Chalcedony

Silicon Dioxide (SiO2)

Breccia

Polymictic volcanic breccia (likely basaltic-andesitic matrix)

Tektite

Tektite (meteoritic glass)