Man Made (Synthetic Rock)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Red gemstone ring, likely synthetic ruby or red spinel

Ruby: corundum (Al₂O₃); spinel: MgAl₂O₄; exact identity requires testing

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives

Pumice

Pumice (Vitreous volcanic rock)

Opal ring (likely precious opal)

Hydrated amorphous silica, SiO₂·nH₂O; the pictured stone may be natural opal or a lab-created/imitation opal

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Ruby (in costume jewelry context)

Corundum (Al2O3) with Chromium impurities

Opal stud earrings

Opal, hydrated amorphous silica (SiO₂·nH₂O)

Quartzite

Metamorphic Quartzite (SiO2)

Blue-green faceted gemstone, likely turquoise or treated turquoise

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

Diamond Druzy (Crystalline Diamond)

Carbon (C)

Clear Quartz (Faceted) / White Sapphire / Goshenite

Silicon Dioxide (SiO2) / Aluminium Oxide (Al2O3)

Blue Lace Agate

Chalcedony (SiO2) with trace inclusions

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond

Slate

Metamorphic Pelitic Rock

Beach Pebble Quartzite / Chalcedony Pebble

Silicon Dioxide (SiO2)

Green sea glass (likely)

Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Likely sandstone pebble

Quartz-rich sandstone (composition uncertain from the image)

Grey Chalcedony

Silicon Dioxide (SiO2)

Pearl-embellished decorative cross

Pearl (biogenic calcium carbonate, predominantly aragonite) with rhinestone-mounted glass or synthetic gemstones

Purple cabochon gemstone, likely amethyst or purple sapphire/spinel

Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)

Cubic Zirconia (simulant) or Diamond

ZrO2 (Cubic Zirconia) or C (Diamond)

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Polished, carved gemstone (possibly dyed agate or glass-like material)

Unconfirmed from the image; no specific mineral can be identified reliably

Gold coin pendant on a chain

Gold (Au), likely a coin set in a gold-colored metal mount

Lapis Lazuli

Lazurite-dominated metamorphic rock ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Pearl-and-gemstone insect brooch

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

Blue-green turquoise (probable)

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

Polished turquoise cabochon pendant

Turquoise, hydrated copper-aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or matrix-bearing material

White marble

Calcite marble, predominantly CaCO₃

Gold-colored gemstone ring, likely citrine or glass imitation

Indeterminate from image; possible quartz (SiO₂) or yellow glass set in gold-colored metal

Green Agate

Silicon dioxide (SiO₂)

Polished jasper pebble

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with possible iron-oxide and other mineral inclusions

Milky quartz

Quartz (silicon dioxide, SiO₂)

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Tumbled milky chalcedony (likely common opal or quartz-rich chalcedony)

Chalcedony, microcrystalline SiO₂; identification is uncertain from the photo

Turquoise

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

Brecciated jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), with iron-oxide staining

Granite

Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)

Ruby

Corundum (Al2O3 with Chromium trace impurities)

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)