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

Polished Ocean Jasper (orbicular jasper)

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

Tumbled jasper or iron-rich chert fragments

Jasper/chert, predominantly microcrystalline quartz (SiO₂) with iron-oxide inclusions

Tumbled red jasper (probable)

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Red jasper (likely brecciated jasper)

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

Ruby

Corundum (Al2O3 with Chromium impurities)

Tumbled Quartz (Snow Quartz)

Silicon Dioxide (SiO2)

Ruby

Corundum (mineral species), variety: Ruby (Al2O3 with Cr3+ as the chromophore)

Banded Carnelian

Carnelian (Silicon Dioxide / SiO2)

Tumbled jasper (likely polychrome or brecciated jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities

Tumbled red jasper (likely dyed)

Jasper, microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides; possibly dyed

Tumbled banded agate

Agate, microcrystalline quartz (SiO₂), typically chalcedony with iron-oxide inclusions

Tumbled amethyst

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

Polished agate (likely carnelian or dyed red agate)

Chalcedony, microcrystalline quartz (SiO₂)

Polished jasper

Microcrystalline quartz (SiO₂), likely brecciated or orbicular jasper

Tumbled banded agate

Chalcedony (microcrystalline quartz), SiO₂

Quartz (Agate/Chalcedony variety)

Silicon Dioxide (SiO2)

Likely garnet-bearing schist

Garnet mica schist; commonly quartz + mica (muscovite/biotite) ± garnet

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Moss Agate

Silicon Dioxide (SiO2) with inclusions

Amazonite

Microcline (K(AlSi3O8))

Jasper (specifically Red Jasper or Iron-stained Chert)

Silicon dioxide (SiO2) with iron oxide inclusions

Milky Quartz

Silicon Dioxide (SiO2)

Red jasper (iron-rich chalcedony), possibly brecciated

Jasper: microcrystalline quartz, SiO₂, colored mainly by iron oxides/hydroxides

Rose Quartz

Quartz (SiO₂), specifically a variety of Quartz

Green Calcite (often commercially called Green Onyx)

Calcium Carbonate (CaCO3)

Milky Quartz

Silicon Dioxide (SiO2)

Greenschist

Greenschist (Chlorite-actinolite schist)

Tumbled green stone, possibly serpentine or prehnite

Provisional identification: serpentine-group mineral, commonly antigorite; alternatively prehnite or green calcite

Tumbled jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides and hydroxides

Blue Lace Agate (Polished Point)

Silicon Dioxide (SiO2)

Black tourmaline

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

Specular Hematite (Specularite)

Iron(III) oxide (Fe2O3)

Amazonite

Amazonite (KAlSi3O8); a green variety of Microcline feldspar

Yellow Jasper / Chert

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Tumbled orange chalcedony (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂), orange variety commonly called carnelian

Garnet-bearing metamorphic rock, likely schist or gneiss

Biotite–garnet schist/gneiss; dark minerals likely biotite and graphite or amphibole, with quartz and feldspar

Orange Calcite

Calcium Carbonate (CaCO3)

Red jasper (polished/cut rough)

Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Red jasper / red chert

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

Polished mahogany obsidian (probable)

Volcanic glass; primarily rhyolitic silica glass (SiO₂), with iron-oxide inclusions

Dyed Blue Agate

Silicon dioxide (SiO2) with artificial pigment

Gypsum (Selenite crystals in Halite/Clay matrix)

Calcium Sulfate Dihydrate (CaSO4·2H2O)