Sedimentary (Imitation)

Pink corundum (likely synthetic or treated sapphire)

Corundum, Al₂O₃; pink coloration commonly from chromium or treatment

Pearl

Biogenic calcium carbonate; mainly aragonite (CaCO₃), sometimes calcite, in nacre

Tumbled blue stone, likely dyed howlite or magnesite

Howlite (Ca₂B₅SiO₉(OH)₅), possibly magnesite (MgCO₃), artificially blue-dyed

Red/pink faceted gemstone, likely synthetic ruby or red glass

Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually

Ruby (or potential synthetic/imitation)

Corundum (Al2O3)

Polished amber-like gemstone bead

Possibly amber (fossilized tree resin; composition varies)

Turquoise (Likely stabilized or dyed magnesite/howlite)

CuAl6(PO4)4(OH)8·4H2O (for true turquoise) or MgCO3 (for magnesite)

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Angelite

Anhydrite (Calcium Sulfate, CaSO4)

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous Phosphate of Copper and Aluminum)

Blue-and-white opalite sphere

Opalite (commercial synthetic or glass-based imitation; not true opal), typically silica glass or synthetic opalescent material

Dyed or treated turquoise-like tumbled stone

Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), though blue-green magnesite or howlite imitation is possible

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Tumbled reddish-brown chalcedony, possibly carnelian

Chalcedony (microcrystalline quartz), SiO₂; red variety commonly called carnelian

Amber

Succinite (specifically for Baltic Amber), Formula: C10H16O

Pearl necklace with small blue-green gemstone accents

Pearls: nacre, chiefly aragonite (CaCO₃) and conchiolin; accents appear to be turquoise or similar opaque blue-green stone

Tumbled turquoise

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

Blue lace agate (likely dyed or color-enhanced)

Microcrystalline quartz (chalcedony), SiO₂

Tumbled milky quartz (likely quartz/chalcedony)

Quartz, SiO₂; possibly microcrystalline chalcedony

Pearl-and-gemstone insect brooch

Pearl: nacre (aragonite, CaCO₃); colored stones are likely synthetic or natural corundum/spinel/glass, not determinable from the image

Strawberry Quartz (or Pink Aventurine)

Quartz with Hematite/Goethite inclusions (SiO2)

Dyed Magnesite (Howlite imitation)

Magnesium carbonate (MgCO3) with dye

Dyed howlite or turquoise imitation

Howlite: Ca₂B₅SiO₉(OH)₅; turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O

Tumbled agate or chalcedony

Microcrystalline quartz (SiO₂), likely gray-brown agate/chalcedony

Turquoise bead bracelet

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

Polished blue lace agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with blue-gray banding and a druzy quartz center

Tumbled carnelian

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

Dalmatian jasper

Orbicular rhyolite, commonly marketed as Dalmatian jasper; quartz–feldspar volcanic rock with dark aegirine/arfvedsonite-like inclusions

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Faceted colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (quartz, SiO₂); identity is uncertain because the photograph shows only intense facet reflections

Likely opal-inlay cross pendant

Opal (hydrated amorphous silica, SiO₂·nH₂O); central red stone is unidentified

Yellow faceted gemstone, likely citrine

Citrine (yellow quartz, SiO₂); identification from the image is tentative

Blue-green tumbled gemstone, likely turquoise or dyed turquoise

Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image

Emerald

Beryl, Be₃Al₂(SiO₃)₆, colored green mainly by chromium and/or vanadium

Green cabochon gemstone, likely glass-filled or synthetic emerald imitation

Uncertain; possible synthetic emerald (beryl, Be₃Al₂Si₆O₁₈) or green glass

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Red faceted gemstone, likely synthetic ruby or red glass imitation

Possibly synthetic corundum (Al₂O₃:Cr³⁺); image alone cannot distinguish it from glass or another imitation

Dyed howlite or magnesite turquoise imitation beads

Howlite: Ca₂B₅SiO₉(OH)₅; commonly dyed blue to resemble turquoise

Tumbled carnelian or orange chalcedony

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

Blue gemstone, likely aquamarine

Beryl, Be₃Al₂Si₆O₁₈, colored blue by iron impurities

Pearl

Calcium carbonate (CaCO3) - mainly Aragonite with Conchiolin