Synthetic (Not A Rock Or Mineral)

Weathered granite or granitic pegmatite fragment

Granite; chiefly quartz (SiO₂), feldspar, and mica, possibly iron-oxide alteration

Carnelian

Carnelian (Cryptocrystalline Quartz, SiO2)

Blue-green turquoise (probable)

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

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Red coral (coral beads)

Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)

Dyed Quartzite

Metamorphosed Quartz (SiO2) with synthetic pigment

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

Cut purple gemstone, likely synthetic cubic zirconia or glass

Undetermined; possible cubic zirconia (ZrO₂)

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Clear faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); visual identification is not definitive and diamond or synthetic moissanite are alternatives

Quartz-rich rock fragment

Likely quartz vein material, predominantly quartz (SiO₂); identification is tentative from the image

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Rough Ruby

Corundum (Al2O3 with Chromium impurities)

Decorative opal-like turtle mosaic

Likely imitation or assembled opal material; exact stones cannot be confirmed visually

Blue-green opal, likely polished common or synthetic opal

Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Likely silicon carbide (carborundum)

Synthetic silicon carbide (SiC), likely blue-green crystalline grit

Serpentinite

Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Greenstone (likely serpentine-rich rock)

Serpentinite, composed mainly of serpentine-group minerals

Likely rough green aventurine

Quartz (SiO₂), with green coloration likely from mica or other inclusions

Smoky Quartz

Silicon Dioxide (SiO2)

Turquoise-colored ring stone (possibly turquoise or imitation)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image

Granite pebble

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Likely tiger’s-eye rough fragment

Tiger’s-eye (quartz, SiO₂, with fibrous crocidolite-derived inclusions)

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Opalite (Man-made Glass)

Synthetic Opalised Glass

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Green glassy gemstone-like specimen

Likely synthetic glass or treated quartz; exact identification requires testing

Iron-stained rock fragment, possibly quartz-rich

Unidentified quartz-rich rock with iron-oxide staining (likely hematite/goethite)

Quartz-rich rock, possibly vein quartz in host rock

Quartz (SiO₂), with unidentified host-rock minerals

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)

Blue-green faceted pendant stone

Undetermined; possibly synthetic glass or a blue-green gemstone such as topaz or quartz

Turquoise (small irregular fragment)

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

Polished brecciated jasper

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

Unidentified pale mineral or rock surface

Indeterminate from image; possibly a small quartz or feldspar grain

Goldstone

Avventurina (Cu + SiO2 glass)

Likely serpentinite

Serpentinite, composed mainly of serpentine-group minerals (e.g., antigorite, lizardite, or chrysotile)

Polished labradorite cabochon

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

Cubic Zirconia

Zirconium dioxide (ZrO2)