mineral

Mystic Topaz

Aluminum silicate fluoride hydroxide with titanium coating (Al2SiO4(F,OH)2)

Hardness: 8.0 on Mohs scale; Color: Iridescent rainbow (greens, blues, purples); Luster: Vitreous; Crystal structure: Orthorhombic; Specific Gravity: 3.49–3.57.

Hardness: 8
Color: Iridescent rainbow (greens, blues, purples)
Luster: Vitreous

Identified April 26, 2026More mineral →

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Physical properties

Hardness: 8.0 on Mohs scale; Color: Iridescent rainbow (greens, blues, purples); Luster: Vitreous; Crystal structure: Orthorhombic; Specific Gravity: 3.49–3.57.

Formation & geological history

Formed as a natural colorless Topaz in pegmatites and high-temperature quartz veins. The rainbow finish is an anthropogenic process where a thin layer of titanium (CVD coating) is applied to the pavilion of a natural stone.

Uses & applications

Primarily used in jewelry such as rings, pendants, and earrings due to its vibrant, unique color play and high hardness.

Geological facts

Mystic Topaz is not a naturally occurring color; it was first introduced at the Hong Kong Jewelry Fair in 1998. It is sometimes called Rainbow Topaz or Caribbean Topaz.

Field identification & locations

Identify by its unique iridescent rainbow metallic sheen that changes with the angle of light. Unlike Lab-grown stones, the base material is genuine natural topaz, which can be verified by its high hardness and density.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral