Mineral Simulant (Synthetic Glass)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

AI-generated identification · may be incorrect

Hardness: 5-6.5 (Mohs); Color: Milky to clear with an opalescent or ethereal blue glow, often exhibiting an orange or yellow flash when viewed from certain angles or against a dark background; Luster: Vitreous (glassy); Crystal Structure: Amorphous (non-crystalline); Cleavage: None (fractures conchoidally);…

Hardness: 5-6
Luster: Vitreous (glassy)

Identified September 21, 2025More mineral simulant (synthetic glass) →

Explore Opalite (a synthetic glass) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Opalite is a man-made glass, not a natural mineral. It is created by heating glass material and adding certain substances to achieve its characteristic opalescent effect. It does not have a geological age in the traditional sense, as it is manufactured.

Uses & applications

Primarily used in jewelry (beads, pendants, cabochons), ornamental objects, and decorative items due to its attractive visual properties and affordability compared to natural opal.

Geological facts

Also known as 'Sea Opal' or 'Tiffany Stone' (though Tiffany Stone is a natural mineral of fluorite). It's distinct from natural opal (which is hydrated amorphous silica) by its often more uniform appearance and lack of true 'play-of-color' often seen in precious opal. Its blue glow is typically due to scattering light effects rather than diffraction.

Field identification & locations

Due to its synthetic nature, Opalite is not found in the field. It is identified by its smooth, uniform, often milky clarity, distinct blue or orange glow, and lack of inclusions typical of natural stones. It can be distinguished from natural opal by its sometimes 'too perfect' appearance and characteristic uniform glow rather than the internal fire or 'play-of-color' of natural opal. It's often tumbled smooth like the one pictured.

Other mineral simulant (synthetic glass) specimens

See all

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

mineral

Cubic Zirconia (as used in jewelry setting)

Zirconium dioxide (ZrO2)

mineral

Colorless faceted gemstone, likely glass or cubic zirconia

Probably cubic zirconia (zirconium dioxide, ZrO₂); diamond cannot be confirmed visually

gemstone

Faceted Quartz or Cubic Zirconia

SiO2 (Quartz) or ZrO2 (Cubic Zirconia)

gemstone

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

mineralogical simulant

Green glass-like cabochon, likely synthetic glass or resin

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

gemstone