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Gemstone profile and identification guide

Taaffeite

Taaffeite is a rare beryllium-bearing oxide gemstone species distinct from spinel.

8 Mohs Lavender, Pink Violet Oxide (Taaffeite Group)
Taaffeite

Overview

Taaffeite is a rare beryllium-bearing oxide gemstone species distinct from spinel.

Did you know? Taaffeite was first identified from a cut stone rather than from rough mineral discovery.

Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.

Identification

Name: Taaffeite

Scientific classification: Oxide (Taaffeite Group)

Hardness: 8 Mohs

Transparency: transparent

Lustre: vitreous

Crystal system: Hexagonal

Primary colour: Lavender

Secondary colour: Pink Violet

Colour family: Purples

Double refraction distinguishes taaffeite from singly refractive spinel.

Verification Status

Status: verified-core-fields

Reference priority: GIA, Gem-A, Mindat, International Gem Society

Core identity, locality, and physical-property fields reviewed against standard gemological references.

Trade-name and treatment-sensitive entries include explicit disclosure language where applicable.

Physical Properties

Hardness category: hard

Hardness value: 8 Mohs

Chemical composition: Beryllium magnesium aluminum oxide

Crystal system: Hexagonal

Common locations: Sri Lanka, Tanzania, China, Madagascar

Learn more: Gem-A gemstone education resources.

Colour Variations

Very rare facetable gem in lavender to pink-violet tones.

Optical effects: None specified in the current dataset.

Detailed Gemology

Mineral species: Taaffeite

Mineral group: Taaffeite group

Chemical formula: Beryllium magnesium aluminum oxide

Mohs hardness: 8

Crystal system: Hexagonal

Lustre: vitreous

Transparency: transparent

Streak: White

Cleavage: Variable by species/material

Fracture: Conchoidal to uneven

Specific gravity: 3.6-3.7

Refractive index: 1.72-1.73

Optical phenomena: None typically diagnostic

Colour range: Colorless, lavender, pink-violet

Common inclusions: Species-dependent inclusions and growth features

Geological environment: Species-dependent

Principal mining regions: Sri Lanka, Tanzania, China, Madagascar

Important commercial sources: Taaffeite is extremely rare and mostly encountered in collector-level faceted stones

Historical significance: Recognized in gemological and lapidary trade.

Common treatments: Generally untreated due rarity.

Synthetic or imitation forms: Imitations may exist depending on species.

Common look-alikes: Species-dependent look-alikes.

Jewellery uses: Primarily collector faceted stones and high-end specialty jewelry.

Care recommendations: Hard and suitable for jewelry, but rarity favors collector handling.

Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for Taaffeite.

Formation

Forms in metamorphic environments and alluvial deposits derived from host rocks.

Origin

Taaffeite is extremely rare and mostly encountered in collector-level faceted stones

Uses

Best for: Primarily collector faceted stones and high-end specialty jewelry.

Ideal uses: Rare-gem collectors and advanced gem cabinets.

Taaffeite FAQ

How can I identify Taaffeite?

Compare hardness (8 Mohs), crystal system (Hexagonal), colour profile, and lustre (vitreous) with your sample. Then cross-check related gemstones listed above.

What colour range does Taaffeite appear in?

Very rare facetable gem in lavender to pink-violet tones.

Where is Taaffeite commonly used?

Rare-gem collectors and advanced gem cabinets.. For maintenance, follow the care guidance in this profile.