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

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Sapphire in a ring

Corundum (Al2O3)

Tumbled brown jasper (probable)

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

Tumbled green aventurine

Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions

Polished blue calcite

Calcite (CaCO₃), likely blue banded or massive calcite

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

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

Garnet

Garnet group [X3Y2(SiO4)3]

Garnet

Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3

Red jasper pebble

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

Tumbled jasper, likely red/brown jasper

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

Carved serpentine wing sculpture

Serpentine-group rock, chiefly antigorite/lizardite: Mg3Si2O5(OH)4

Garnet Schist

Garnetiferous Mica Schist

Quartz–feldspar pegmatite with garnet

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, mica, and reddish-brown almandine garnet

Rutilated quartz bead bracelet

Quartz, silicon dioxide (SiO₂), with rutile inclusions (TiO₂)

Polished red jasper

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

Amazonite

Amazonite (KAlSi3O8)

Diamond

Diamond (C)

Red jasper (likely brecciated jasper)

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

Ruby

Corundum (Al2O3 with Chromium impurities)

Biotite Schist with Garnet

Garnet-Biotite Schist

Gneiss (specifically a weathered Amphibolite or Garnet Gneiss)

Gneiss (complex silicate composition)

Red jasper (iron-rich chalcedony), possibly brecciated

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

Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Yellow Jasper

Tectosilicates (SiO2) with Goethite/Iron oxide inclusions

Amazonite

K(AlSi3O8) - Potassium Aluminum Silicate

Yellow Jasper

Silicon dioxide (SiO2)

Schist

Schist (various mineral compositions)

Black Garnet (Melanite)

Andradite, Ca3Fe2(SiO4)3

Schist

Mica Schist

Polished/patinated jasper slab

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

Chalcedony

Silicon Dioxide (SiO2)

Fancy Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Schist

Mica Schist

Agate

Agate (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Schist

Schist

Sandstone (with garnet granules)

Clastic sedimentary rock (primarily SiO2 with Fe3Al2(SiO4)3 inclusions)

Black Onyx

Silicon dioxide (SiO2)