Not A Rock (Synthetic Material)

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Dyed Agate Geode

Silicon Dioxide (SiO2) with artificial pigment

Dyed Quartz Pendant

Silicon Dioxide (SiO2) with artificial dye

Silicon

Element Si

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Opal stud earrings

Opal, hydrated amorphous silica (SiO₂·nH₂O)

Strawberry Quartz (or Sunstone / Tumbled Quartz)

Silicon Dioxide (SiO2) with Hematite/Lepidocrocite inclusions

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Bauxite

Bauxite (principal ore of aluminum, primarily Al(OH)3)

Lapis Lazuli

Lazurite-dominant Metamorphic Rock (complex aluminosilicate)

Weathered granite or granitic gneiss pebble

Granite: quartz + feldspar + mica; possibly weakly foliated gneiss

Lapis Lazuli (Tumbled)

Lazurite-dominated contact metamorphic rock

Lapis Lazuli

Na8[Al6Si6O24]Sn (Lazurite-rich metamorphic rock)

Faceted yellow-green gemstone, likely peridot

Olivine, typically forsterite-rich (Mg₂SiO₄)

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

Small faceted gemstone, likely diamond

Diamond (crystalline carbon, C)

Blue resin-coated or dyed stone cabochon

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

Goldstone (Red)

Aventurine Glass

Polished brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide coloration and possible breccia fragments

Turquoise

Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Dyed turquoise bead

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

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Diamond jewelry pendant or cluster

Diamond, crystalline carbon (C), likely mounted in metal

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Bauxite

AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Dalmatian Stone

Dalmatian Stone (Felsic Igneous Rock)

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Pearls (likely freshwater cultured pearls)

Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin

Botryoidal hematite (specular hematite)

Hematite, Fe₂O₃

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Lapis Lazuli

Lazurite-rich metamorphic rock (approx. Na6Ca2(Al6Si6O24)(S,SO4,Cl)1,2)

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

Cowrie shell

Marine gastropod shell; likely a cowrie (family Cypraeidae), species not identifiable from the image