Sedimentary (Imitation)

Opal cabochon

Opal, hydrated amorphous silica (SiO₂·nH₂O), likely common or Ethiopian precious opal

Polished turquoise cabochon (likely turquoise or imitation)

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Tumbled dark-blue stone, likely sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂ (tentative)

Probable amber fragment

Amber (fossilized plant resin; chiefly amorphous organic resin, commonly dominated by succinite)

Amber-set ring

Amber (fossilized plant resin; organic mineraloid), set in a metal ring

Polished malachite

Malachite, Cu₂CO₃(OH)₂

Ruby (Faceted)

Corundum (Al2O3:Cr)

Howlite

Calcium borosilicate hydroxide (Ca2B5SiO9(OH))

Ruby (set in a ring)

Corundum, Al₂O₃, colored red by chromium; the pictured stone may be synthetic or imitation, which cannot be confirmed from the photo.

Turquoise beads

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; some beads may be stabilized or dyed

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony with iron-oxide and other mineral inclusions; SiO₂

Jade (specifically Nephrite or Jadeite beads)

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)

Yellow cabochon, likely amber or yellow glass/resin

Unconfirmed; possibly amber (fossilized tree resin, an amorphous organic material)

Faceted diamond gemstone (likely)

Diamond — crystalline carbon, C

Turquoise (Dyed Howlite/Magnesite)

CuAl6(PO4)4(OH)8·4H2O (Natural Turquoise) or Ca2B5SiO9(OH)5 (Howlite)

Pearl

Calcium carbonate (CaCO3) as Aragonite or Calcite

Beaded bracelet with black and white stone beads

The white beads may be howlite (Ca₂B₅SiO₉(OH)₅); the glossy black beads cannot be identified confidently from the image and may be obsidian, onyx, or another material.

Lemon Quartz (Orizaba/Citrinated Quartz)

Silicon Dioxide (SiO2) with iron impurities/treatment

Black obsidian cabochon or sphere

Obsidian (volcanic glass), chiefly SiO₂

Cultured pearls

Pearl; predominantly aragonite (CaCO₃) in nacre with organic conchiolin

Likely polished dark gemstone cabochon

Indeterminate; possibly black chalcedony/agate, obsidian, or glass imitation

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Black spinel bead strand

Spinel, magnesium aluminum oxide (MgAl₂O₄)

Green aventurine (likely)

Quartz variety; silicon dioxide (SiO₂), commonly colored by fuchsite mica or other inclusions

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Turquoise (Dyed Howlite or Magnesite imitation)

Hydrated phosphate of copper and aluminum / CuAl6(PO4)4(OH)8·4H2O

Red Coral

Corallium rubrum

Blue resin-coated or dyed stone cabochon

Likely dyed chalcedony/agate (microcrystalline quartz, SiO₂); exact material is uncertain from the image

Pearl

Nacre (aragonite, CaCO₃, with conchiolin)

Green glassy mineral specimen, likely chromium-bearing fluorite (tentative)

Fluorite, CaF₂, possibly green fluorite; identification uncertain from image

Green aventurine (likely dyed quartzite)

Quartzite, predominantly quartz (SiO₂), colored by fuchsite mica or artificial dye

Dyed turquoise bead

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or reconstructed turquoise

Polished labradorite cabochon

Labradorite, plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Likely polished amber or amber-like resin specimen

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin; exact identification uncertain from the image

Blue-dyed tumbled quartz or glass imitation

Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image

Green Aventurine

Aventurine Quartz (SiO2) with Fuchsite inclusions

Polished dendritic agate cabochon (likely agate or jasper)

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

Faceted colorless gemstone, likely quartz (rock crystal)

Quartz, SiO₂

Tumbled cat’s-eye stone, likely cat’s-eye glass or imitation

Undetermined; natural chrysoberyl cat’s-eye is BeAl₂O₄, but the photo does not establish that identity

Black Onyx

Cryptocrystalline Quartz (SiO2)

Moonstone (specifically White Moonstone or Girasol Quartz)

Potassium aluminum silicate (KAlSi3O8)

Gemstone bead necklace (likely citrine or yellow quartz)

Quartz, SiO₂; precise identification is uncertain because the beads are blurred and metal settings obscure them