Rock Identifier
Diamond (or Cubic Zirconia) (Carbon (C) or Zirconium Dioxide (ZrO2)) — gemstone
gemstone

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Hardness: 10 (Diamond) or 8-8.5 (CZ); Color: Colorless; Luster: Adamantine; Crystal Structure: Isometric; Dispersion: Very High.

Hardness
10 (Diamond) or 8-8
Color
Colorless
Luster
Adamantine
Identified More gemstone
Explore Diamond (or Cubic Zirconia) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

Physical properties

Hardness: 10 (Diamond) or 8-8.5 (CZ); Color: Colorless; Luster: Adamantine; Crystal Structure: Isometric; Dispersion: Very High.

Formation & geological history

Diamonds form in the Earth's mantle under intense heat and pressure over billions of years; CZ is synthesized in laboratories using the skull melt process.

Uses & applications

Fine jewelry, industrial abrasives (if diamond), or affordable costume jewelry (if CZ).

Geological facts

Diamond is the hardest natural substance known on Earth. One stone is missing from this pendant, a common occurrence in prong-set fashion jewelry.

Field identification & locations

Identification requires professional tools like a thermal conductivity probe or weighing for specific gravity; the setting appears to be costume jewelry made of gold-plated base metal.