Mineral (Treated)

Prasiolite and Quartz Crystal Cluster

Quartz (SiO2); Prasiolite is a variety of Quartz

Tiger’s eye

Quartz variety, primarily silicon dioxide (SiO₂); fibrous quartz pseudomorph after crocidolite asbestos

Tumbled Agate

Cryptocrystalline Silicon Dioxide (SiO2)

Amber

Fossilized Tree Resin (Amorphous Hydrocarbon)

Citrine

Quartz (SiO₂)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Pink quartz bead strand (likely rose quartz or pink dyed quartz)

Quartz, silicon dioxide (SiO₂); probable rose quartz variety, possibly dyed or treated quartz/chalcedony

Rutilated Quartz (likely Citrine or Smoky Quartz with Rutile inclusions)

SiO2 with TiO2 inclusions (Quartz with Rutile)

Turquoise cabochon

Turquoise; hydrated copper–aluminum phosphate, approximately CuAl6(PO4)4(OH)8·4H2O (composition varies)

Black Onyx

Chalcedony (SiO2)

Amber (Green variation)

Succinite

Carnelian

Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO₂)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)

Quartz (Rock Crystal) with minor impurities

Quartz (SiO2)

Peridot and Citrine Gemstones (in a ring setting)

Peridot (Olivine: (Mg,Fe)2SiO4), Citrine (Quartz: SiO2)

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)

Green jade bangle

Jadeite (NaAlSi₂O₆) or nephrite, a tremolite–actinolite amphibole

Aquamarine

Aquamarine (Beryl variety) - Be3Al2(Si6O18)

Carnelian

Chalcedony (cryptocrystalline quartz), SiO2

Turquoise (likely Sleeping Beauty variety or treated Howlite imitation)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Rhodonite beads (possibly dyed or treated, or lower quality Rhodonite)

Manganese inosilicate, (Mn,Fe,Mg,Ca)SiO3

Turquoise (beads)

Turquoise; CuAl6(PO4)4(OH)8·4H2O

Carnelian

Carnelian (a variety of Chalcedony, which is a microcrystalline quartz, SiO2)

Red Tiger's Eye beads

Tiger's Eye (variety of Chalcedony, SiO2)

Banded malachite cabochon

Malachite, Cu₂CO₃(OH)₂; the dark bands may be manganese-oxide or other sulfide-rich matrix, and could also indicate a composite or treated specimen

Ruby

Corundum (Al₂O₃) with Chromium (Cr)

Turquoise

Turquoise (CuAl6(PO4)4(OH)8·4H2O)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Amber (Black)

Amber (succinite, retinite, etc., specifically, heavily included/dark varieties)

Blue-green cabochon, likely chalcedony or treated glass imitation

Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

Mineral Sand (Heavy Mineral Sand Concentrate)

Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Septarian Pebble

Septarian nodule / Concretion

Soil with Mineral Detritus and Quartz Fragments

Regolith / Silicate Mineral Aggregate

Schist

Schist

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Limonite / Goethite (Iron Ore Mineral nodule)

FeO(OH)·nH2O / FeO(OH)

Gypsum (variety Selenite or Alabaster)

Calcium sulfate dihydrate (CaSO4·2H2O)

Granite

Granite (Phaneritic intrusive igneous rock)

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)