Mineralogical Simulant

Gem-set gold ring

Likely a faceted diamond (carbon, C) set in a gold-alloy ring; the surrounding stones are not identifiable from the image.

Small clear faceted gemstone, possibly cubic zirconia

Unconfirmed; cubic zirconia (ZrO₂) is a possibility, but diamond or another colorless stone cannot be identified from this image alone

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Diamond ring (likely a faceted clear gemstone)

Diamond, crystalline carbon (C); the setting appears to be gold-colored metal

Orbicular jasper (likely kambaba jasper)

Silicified microcrystalline quartz and chalcedony with dark-green amphibole or other mafic mineral inclusions; trade name “kambaba jasper”

Small blue-green mineral or stone bead

Unidentified opaque blue-green mineral; the image is insufficient for reliable species identification

Small tumbled stone, likely quartz-rich pebble

Probably microcrystalline quartz (SiO₂), but the image is insufficient for a definitive identification

Small rounded stone or mineral fragment

Indeterminate; likely a common quartz- or feldspar-bearing silicate fragment

Faceted transparent gemstone, likely glass or cubic zirconia

Uncertain from image; possible cubic zirconia (zirconium dioxide, ZrO₂) or glass imitation

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Red gemstone ring (likely synthetic ruby or red glass)

Possibly corundum (Al₂O₃), chromium-colored; identity cannot be confirmed from the image

Weathered greenstone (possible serpentinite)

Greenstone, a broad term for metamorphosed mafic rock; exact identification is uncertain from the photograph

Geode with Quartz/Chalcedony

Silicon Dioxide (SiO2)

Diamond (or Diamond Simulant)

Carbon (C) or Zirconium dioxide (ZrO2) for CZ

Polished dark-green stone, possibly jade or serpentine

Indeterminate from the photo; candidates include jadeite (NaAlSi₂O₆), nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂), or serpentine-group minerals

Diamond (or Diamond Simulant)

Carbon (C)

Diamond (or Diamond Simulant)

Carbon (C) - Native Element

Diamond (or Diamond Simulant)

Carbon (C)

Diamond (or Cubic Zirconia / Rhinestones)

Carbon (C) or Zirconium dioxide (ZrO2)

Diamond-set gold ring

Diamond (carbon, C) in a gold alloy setting; the image does not establish the stone’s identity or authenticity

Iron Slag

Iron smelting byproduct (Glassy/vesicular silicate)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Polished orbicular gabbro tower

Gabbro, likely orbicular/pegmatitic variety; mainly plagioclase feldspar and pyroxene, with possible amphibole, olivine, and magnetite

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Gold ring with a clear faceted gemstone

Likely diamond (carbon, C); the photograph is insufficient to confirm the stone or metal

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Blue-dyed tumbled stone, likely howlite or magnesite

Likely dyed magnesite (MgCO₃) or howlite (Ca₂B₅SiO₉(OH)₅); identification is uncertain from the image

Diamond ring

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

Unidentified purple mineral fragment

Possibly amethyst (quartz), but the image is insufficient for confident identification

Serpentinite

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

Tumbled serpentine (likely nephrite-like greenstone)

Serpentine-group minerals, chiefly antigorite/lizardite; possibly mixed with tremolite-actinolite

Tumbled serpentine or chlorite-rich pebble

Serpentine-group minerals, chiefly antigorite/lizardite; possibly chlorite or greenstone

Dalmatian jasper

Quartz-bearing, orbicular microcrystalline silica (commonly sold as “Dalmatian jasper”; often an altered porphyritic igneous rock)

Diamond (or Diamond Simulant)

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

River Pebbles (Stream-rounded rocks)

Fluvial Detritus (varied mineralogy)

Cubic Zirconia (CZ)

Cubic Zirconium Dioxide (ZrO2)

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Cubic Zirconia (in Jewelry)

Zirconium Dioxide (ZrO2)

Color-change gemstone ring (stone possibly alexandrite or a synthetic imitation)

Undetermined from the image; alexandrite is chrysoberyl, BeAl₂O₄

Green glass-like cabochon, likely synthetic glass or resin

Unidentified green transparent material; possibly molded glass, synthetic spinel, or resin

Petrified Wood

Silicified Wood (SiO2)