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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Milky Quartz

Silicon Dioxide (SiO2)

Mica Schist

Schist (primarily muscovite and quartz)

Amazonite

Amazonite (KAlSi3O8, a variety of Microcline)

Garnet Schist

Garnetiferous Mica Schist

Black Garnet (Melanite)

Andradite, Ca3Fe2(SiO4)3

Biotite-rich schist (likely mica schist)

Mica schist; predominantly biotite mica with quartz and feldspar

Polished reddish-brown gemstone, likely carnelian

Carnelian: chalcedony, microcrystalline quartz (SiO₂), colored mainly by iron oxides

Polished red jasper pendant

Jasper, an opaque, microcrystalline variety of quartz (SiO₂), colored red by iron oxides

Tumbled red jasper

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

Tumbled agate, likely carnelian/chalcedony

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

Rainbow Moonstone

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

Chert (Jasper variety)

Chert (SiO2)

Orange Calcite

Calcium Carbonate (CaCO3)

Citrine Quartz carving

Silicon Dioxide (SiO2)

Selenite Gypsum

Hydrous calcium sulfate (CaSO4·2H2O)

Weathered garnet-bearing gneiss (likely)

Garnet-bearing gneiss; exact mineral identification is uncertain from the photograph

Tumbled leopard-skin jasper (probable)

Orbicular rhyolite/jasper; primarily microcrystalline quartz (SiO₂) with feldspar and iron-oxide inclusions

Polished jasper pebble, likely ocean or brecciated jasper

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

Tumbled yellow-orange jasper

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

Tumbled yellow jasper (likely iron-stained chalcedony)

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

Red jasper (probable polished chalcedony/jasper)

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

Red jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Brecciated jasper (likely ocean jasper or red jasper)

Microcrystalline quartz, SiO₂, with iron-oxide pigments and breccia cement

Polished blue banded agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with trace iron and other coloring elements

Carnelian (orange-red chalcedony)

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

Polished brecciated jasper

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

Agate (Carnelian / Chalcedony)

Silicon Dioxide (SiO2)

Gray chalcedony (common agate/jasper fragment)

Microcrystalline quartz, SiO₂; likely chalcedony with weathered host-rock rind

Tumbled amazonite

Amazonite, green microcline feldspar (KAlSi₃O₈)

Polished bloodstone (heliotrope)

Chalcedony (microcrystalline quartz, SiO₂) with red iron-oxide inclusions

Red jasper (polished/tumbled)

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

Red jasper-like pebble

Microcrystalline quartz (chalcedony), typically colored by iron oxides; exact identification is uncertain from the image

Amazonite

Microcline (variety Amazonite), K(AlSi3O8)

Tumbled brown jasper

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

Chalcedony (Botryoidal Agate vein)

Chalcedony (Microcrystalline Quartz) - SiO2

Nephrite (a form of Jade)

Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Sunstone

Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)

Polished orbicular jasper (likely ocean jasper)

Silica-rich microcrystalline quartz/chalcedony with iron oxides and accessory minerals; SiO₂-dominant

Sunstone (Feldspar variety)

Plagioclase Feldspar (Na,Ca)(Si,Al)3O8 with Hematite/Goethite inclusions

Polished brecciated jasper pendant

Jasper, an opaque microcrystalline variety of chalcedony (mostly SiO₂), with iron-oxide staining and likely brecciation