Mineral (Silicate Variety)

Rounded gray-green pebble, likely quartz-rich metamorphic rock

Possibly quartzite or quartz-rich schist; identification is uncertain from the photograph

Granite

Intrusive Igneous Rock

Schist

Mica Schist (Complex Silicates)

Bumblebee Jasper

Anhydrite-Aragonite mixture with Orpiment and Realgar

Diorite

Diorite (an intrusive igneous rock)

Tumbled pink feldspar pebble

Potassium feldspar, commonly microcline or orthoclase (KAlSi₃O₈)

Quartz-rich river pebble (likely milky quartz or quartzite)

Quartz, SiO₂; possibly quartzite, a metamorphic rock dominated by quartz

Chrysocolla

Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O)

Diorite

Diorite (plutonic igneous rock)

Quartz-veined Granite or Gneiss Pebble

Silicate-rich metamorphic rock fragment

Black Tourmaline (Schorl)

Schorl (Sodium iron silicate hydroxide boron silicate); NaFe3Al6(BO3)3Si6O18(OH)4

Weathered gray granitic rock

Likely granite or granodiorite; quartz, feldspar, and mica-rich silicate rock

Goethite (Iron Ore)

Goethite (FeO(OH))

Quartz (Small Pebble)

Silicon Dioxide (SiO2)

Quartz

Silicon Dioxide (SiO2)

Bauxite

Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)

Rose Quartz

Silicon Dioxide (SiO2)

Pink-and-gray rhodonite

Rhodonite, manganese inosilicate (MnSiO₃), commonly with manganese oxides

Assorted Semi-Precious Gemstone Crosses

Quartz, Silicates, Carbonates (various)

Smoky quartz ring

Quartz (SiO₂), likely smoky quartz; the surrounding stones and metal cannot be identified reliably from the image.

Tumbled gray feldspar-rich stone, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, potentially fine-grained granite or quartzite

Granite

Felsic intrusive igneous rock

Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Jadeite Jade

NaAlSi2O6 (Sodium Aluminum Silicate)

Diorite (Salt and Pepper Rock)

Diorite

Petrified Wood

Silicified Wood (SiO2)

Sugilite

Sugilite [KNa2(Fe,Mn,Al)2Li3Si12O30]

Granite

Intrusive Igneous Rock

Weathered iron-rich limestone or altered volcanic rock

Probable limonite/goethite-bearing calcite rock; exact identification requires testing

Snowflake Obsidian (Flower Jasper variant)

Vitreous volcanic silicate with cristobalite inclusions

Green sea glass (likely bottle glass)

Man-made soda–lime silicate glass; not a natural mineral

Pyrite with Vesicular Matrix

Iron Disulfide (FeS2)

Diorite

Phaneritic intermediate plutonic rock

Serpentine (Nephrite-like River Cobble)

Serpentinite (Hydrous Magnesium Iron Silicate)

African Turquoise (Jasper)

Silicon Dioxide (SiO2) - Macro-crystalline Quartz with inclusions

Jadeite (Jade)

NaAlSi2O6 (Sodium Aluminum Silicate)

Jadeite (Jade Ring)

NaAlSi2O6 (Sodium Aluminum Silicate)

Bumblebee Jasper (technically Bumblebee Stone)

Calcite, Aragonite, and Realgar/Orpiment mixture (SiO2 + CaCO3 + As2S3/As2S2)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Amazonite (likely mixed with other feldspars/minerals)

Amazonite is a variety of Microcline, which is a tectosilicate mineral, formula KAISi3O8. The mixed beads could include other feldspars or quartz.

Weathered mineralized rock fragment

Indeterminate; likely quartz–feldspar-rich lithic material with iron-oxide staining

Aquamarine

Beryl (Be3Al2Si6O18 with Iron traces)