Mineralogical Simulant

Ironstone concretion (likely limonite/goethite-rich)

Iron-oxide/oxyhydroxide-rich concretion, chiefly goethite (FeO(OH)) and limonite; identification from the photo is provisional

Greenstone (likely altered basalt)

Metamorphosed mafic volcanic rock, commonly chlorite- and actinolite-rich; exact identification requires testing

Tumbled Dalmatian stone (Dalmatian jasper)

Trade name; commonly a leucocratic igneous rock with dark aegirine/arfvedsonite-group inclusions, often sold as “Dalmatian jasper”

Blue-green copper mineral (possibly chrysocolla or turquoise)

Undetermined from the image; chrysocolla is a hydrated copper silicate, Cu₂H₂O₅Si, while turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Dalmatian jasper

Orbicular rhyolite, commonly sold as Dalmatian jasper; quartz- and feldspar-rich volcanic rock with dark amphibole/biotite inclusions

Diamond (or Diamond Simulant / Melee)

Carbon (C) / or synthetic cubic zirconia (ZrO2)

Faceted colorless gemstone, likely cubic zirconia or quartz

Uncertain from photograph; cubic zirconia (ZrO₂) is the leading visual possibility, with quartz (SiO₂) as an alternative

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Possible green tourmaline (small rough crystal fragment)

Possibly elbaite, Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₄; identification is uncertain from the blurry image

Polished green-gray stone, possibly serpentine

Likely serpentine-group rock, composed mainly of serpentine minerals; identification is uncertain from the photo

Tumbled basalt pebble

Basalt; fine-grained plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Weathered greenish-brown rock, likely serpentinized ultramafic rock

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), possibly with olivine, pyroxene, magnetite, or carbonate

Blue cabochon gemstone, likely blue sapphire

Corundum (Al₂O₃), colored blue by trace iron and titanium

Yellow-green faceted gemstone (possibly peridot)

Undetermined; peridot is gem-quality olivine, (Mg,Fe)₂SiO₄

Mixed Mineral and Crystal Assortment

Various silicate and oxide minerals

Porphyritic Rhyolite

Felsic Extrusive Igneous Rock

Yellow chalcedony (likely dyed or heat-treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Black faceted gemstone, possibly black spinel or onyx

Undetermined; candidates include spinel (MgAl₂O₄) or chalcedony (SiO₂)

Tumbled brown-and-black stone, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; commonly plagioclase, pyroxene, and possibly olivine or iron oxides

Weathered greenish rock fragment

Indeterminate; possibly epidote- or chlorite-bearing altered silicate rock

Faceted colorless gemstone, likely cubic zirconia or diamond

Cubic zirconia (zirconium dioxide, ZrO₂) or diamond (carbon, C)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

Opalite

Synthetic Glass / Man-made Opal Simulant

Diamond (or Diamond Simulant)

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

Likely turquoise-colored mineral or dyed stone

Unidentified opaque blue-green material; turquoise, chrysocolla, dyed howlite, or glass cannot be distinguished from the image alone

Small blue cut gemstone, possibly synthetic spinel or glass; species cannot be determined from the photo

Undetermined; blue synthetic spinel (MgAl₂O₄) is one possibility

Faceted gemstones, likely assorted quartz or glass-like gems

Not determinable from the photograph; possible quartz (SiO₂), topaz, or synthetic cubic zirconia

Sphalerite with quartz

Sphalerite (ZnS), associated with quartz (SiO₂)

Polished purple chalcedony (likely lavender agate)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly naturally iron- or manganese-colored

Tiger's Eye (with Hematite/Jasper)

SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)

Diamond (or Cubic Zirconia simulant)

Carbon (C) or Zirconium Dioxide (ZrO2)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, and Biotite)

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Granite

Phaneritic Plutonic Felsic Rock

Granite (Fine-grained)

Phaneritic Felsic Igneous Rock

Granite

Granite (Felsic Plutonic Rock)

Granite

Phaneritic Plutonic Igneous Rock (Granite)

Granite

Phaneritic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)

Granite

Felsic Intrusive Igneous Rock

Clear faceted quartz-like gemstone

Probably rock crystal quartz (SiO₂), though the image may show synthetic glass or cubic zirconia

Fossilized oyster shell in limestone

Bivalvia fossil; chiefly calcite (CaCO₃)

Diamond ring

Diamond, crystalline carbon (C), set in a metal ring