Sedimentary Rock Or Mineral (Depending On Origin And Purity)

Turquoise cabochon

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

White Quartz

Silicon Dioxide (SiO2)

Sapphire

Corundum (Al2O3)

Rounded river cobble, likely weathered sandstone or quartzite

Indeterminate clastic silicate rock; possibly quartz-rich sandstone (SiO₂-dominant)

Pink Granite

Felsic Intrusive Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Alexandrite

Chrysoberyl (BeAl2O4 with Chromium impurities)

Gold

Native Gold (Au)

Small tumbled dark stone, possibly sodalite or blue-gray jasper

Undetermined from the image; visual appearance is consistent with sodalite-bearing rock or jasper

Turquoise (likely stabilized or composite)

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

Weathered quartz-rich river cobble

Likely granitic or quartzitic rock; exact identification is uncertain from the photograph

Dyed or treated turquoise-like tumbled stone

Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), though blue-green magnesite or howlite imitation is possible

Massive Quartz (Milky or Gray)

Silicon Dioxide (SiO2)

Quartz-rich rock, possibly quartzite

Quartzite (dominantly quartz, SiO₂); identification is provisional from the photo

Yellow Calcite

Calcium Carbonate (CaCO3)

Possibly garnet-bearing rock fragment

Unidentified reddish-brown mineral or rock; the image is insufficient for a reliable species identification.

Fluorite on Matrix

Calcium Fluoride (CaF2)

Blue-green faceted pendant stone

Undetermined; possibly synthetic glass or a blue-green gemstone such as topaz or quartz

Ruby

Corundum (Al2O3 with Chromium impurities)

Milky Quartz Geode with Chlorite

Silicon Dioxide (SiO2) with Chlorite group inclusions

Dyed and polished turquoise

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Quartz (Druzy on Matrix)

Silicon Dioxide (SiO2)

Chert (Black Chert)

Microcrystalline Silica (SiO2)

Granite

Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Rock Specimen

Unclassified rock specimen

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)

Silver

Ag (Native Silver)

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Tumbled turquoise

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Black Jasper

Black Jasper (Silicate mineral - SiO2)

Polished Stone Pendant (Identity Unclear)

Unknown (Possibly Jasper/Agate/Quartz mixture)

Iron-rich rock fragment (possibly ironstone or limonite/goethite)

Likely ironstone composed largely of goethite/limonite; image alone cannot confirm

Small tan pebble, likely sandstone

Quartz-rich sandstone (tentative identification)

Pebble

Clast (specifically a granule or small pebble)

Tumbled turquoise-like stone

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

Turquoise cabochon pendant

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

Pale green-gray stone, possibly serpentinite

Serpentinite (rock composed mainly of serpentine-group minerals)

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Emerald (Faceted Gemstone)

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Calcite

Calcium Carbonate (CaCO3)

Likely raw gold-bearing rock or native gold specimen

Possibly native gold (Au); identification is uncertain from the image

Possibly red jasper or chalcedony

Microcrystalline quartz (SiO₂), possibly iron-oxide-stained chalcedony