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

Tumbled jasper (likely red/brown jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Tumbled brown jasper

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

Red jasper (likely brecciated jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Tumbled agate/chalcedony (likely moss or plume agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide or mineral inclusions

Tumbled banded agate

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide coloring

Polished agate slice

Agate, a banded variety of chalcedony (microcrystalline SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Fossil Shark Tooth (Sand Tiger Shark type)

Carcharias sp. (likely Odontaspis)

Rainbow Moonstone

White Labradorite (Feldspar variety)

Pink/red faceted gemstone, likely synthetic ruby or pink sapphire

Corundum, aluminum oxide (Al₂O₃); likely lab-grown or treated material

Smoky Quartz

Silicon Dioxide (SiO2)

Biotite-bearing metamorphic rock, likely schist

Mica schist; chiefly quartz, feldspar, and biotite mica

Ocean Jasper

Orbicular Jasper (variety of Chalcedony/Quartz, SiO2)

Polished multicolored jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), likely iron- and manganese-stained chert

Moonstone with Black Tourmaline

Feldspar (KAlSi3O8) with inclusions of Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Red-and-brown agate bead bracelet

Agate, a microcrystalline variety of quartz (SiO₂), likely colored chalcedony/carnelian

Blue Calcite

Calcium Carbonate (CaCO3)

Cobaltian Calcite

Cobalt-bearing Calcite (Ca,Co)CO3

Polished jasper and banded agate specimens

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

Polished brecciated jasper

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and silica vein infill

Tumbled brown jasper

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

Polished brown jasper (likely orbicular or brecciated jasper)

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide and other accessory inclusions

Amazonite (green microcline feldspar)

Microcline, KAlSi₃O₈

Amethyst cluster

Quartz (SiO₂), purple variety colored mainly by iron impurities and irradiation

Polished red jasper pebble

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Polished brown jasper (likely ocean or brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides

Blue Quartz (or Blue Aventurine)

Silicon Dioxide (SiO2) with inclusions (typically Crocidolite or Dumortierite)

Red jasper

Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities

Carnelian (orange chalcedony)

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety

Tumbled carnelian (likely chalcedony)

Carnelian, orange-red cryptocrystalline quartz (SiO₂), a variety of chalcedony

Smoky Quartz

Silicon Dioxide (SiO2)

Schist

Mica Schist

Ruby in Fuchsite

Corundum (Al2O3) in Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)

Jasper (brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities

Schist

Mica Schist

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Polished/tumbled brecciated jasper

Silica-rich microcrystalline quartz (chalcedony), commonly with iron-oxide minerals and assorted lithic fragments

Tourmalinated Quartz

Silicon Dioxide (SiO2) with inclusions of Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Tumbled rose quartz

Quartz, silicon dioxide (SiO₂), pink variety

Moonstone (Grey)

Feldspar (variety Orthoclase/Adularia) with the formula (K,Na)AlSi3O8

Quartz (Milky or Cloudy)

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)