Mineral (Specifically, A Variety Of The Mineral Species Pyrope Almandine Garnet)

Tumbled red jasper

Microcrystalline quartz (chalcedony), predominantly SiO₂, colored by iron oxides

Tumbled jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Chalcedony

Silicon Dioxide (SiO2)

Larimar (Pectolite)

NaCa2Si3O8(OH)

Larimar (Pectolite)

NaCa2Si3O10(OH) (Sodium Calcium Silicate Hydroxide)

Garnet

Garnet group (X3Y2(SiO4)3)

Garnet

Garnet Group (formula varies, e.g., Almasndine: Fe3Al2(SiO4)3)

Garnet

Garnet (X3Y2(SiO4)3)

Smoky Quartz on Feldspar (Granite Pegmatite)

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

Polished orbicular granite (likely larvikite or rapakivi-type granite)

Granite; primarily quartz, potassium feldspar, plagioclase, and biotite/hornblende

Polished/patinated jasper slab

Microcrystalline quartz (SiO₂), commonly chalcedony with iron-oxide and clay inclusions

Bi-Color Tourmaline (or Watermelon Tourmaline)

Tourmaline (complex borosilicate mineral group with general formula AD3G6(BO3)3T6O18(OH,O)4)

Polished ocean jasper (orbicular jasper), possibly brecciated jasper

Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide pigments and minor volcanic inclusions

Travertine (Tufa)

Chemical Limestone (CaCO3)

Schist/Phyllite

Metamorphic Schist (Chlorite Schist variety)

Blue Calcite

Calcium Carbonate (CaCO3)

Black Tourmaline

Schorl (Sodium Iron Aluminum Borosilicate Hydroxide)

Polished/tumbled serpentine

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

Schist (Micaceous Schist)

Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)

Granite (Giallo Ornamental / Venetian Gold)

Granite (composed mainly of Quartz, Feldspar, Biotite, and Garnet)

Blue Quartzite

Quartzite (specifically a variety enriched with blue-coloring minerals)

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Polished brown jasper (brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and dark mineral inclusions

Schist

Mica Schist (Variable chemistry, often rich in muscovite and biotite)

Aquamarine

Beryl (Be3Al2Si6O18), specifically the blue-green variety

Serpentine (likely antigorite-rich serpentinite fragment)

Serpentine-group minerals, chiefly Mg₃Si₂O₅(OH)₄

Blue Lace Agate (Tumbled)

Silicon Dioxide (SiO2) with trace minerals

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Citrine Quartz

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Tumbled greenstone (likely serpentine or nephrite-like material)

Serpentinite, chiefly serpentine-group minerals; exact identification requires testing

Chert / Jasper

Microcrystalline Quartz (SiO2)

Black Tourmaline (Schorl)

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Staurolite

Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)

Tumbled jasper pebble

Jasper, microcrystalline quartz (SiO₂), commonly iron-oxide stained

Tumbled jasper (likely yellow/orbicular jasper)

Microcrystalline quartz, SiO₂, with iron-oxide and other mineral inclusions

Moonstone (specifically Rainbow Moonstone / White Labradorite)

White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)

Milky Quartz

Silicon dioxide (SiO2)

Carnelian Agate

Silicon Dioxide (SiO2) with Iron Impurities

Citrine

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

Yellow Calcite

Calcium Carbonate (CaCO3)

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO2) with iron oxide impurities

Chalcedony (Agate/Chert)

Silicon Dioxide (SiO2)