Gemstone profile and identification guide
White Sapphire
White sapphire is the colorless variety of corundum valued for durability and brilliance.
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Overview
White sapphire is the colorless variety of corundum valued for durability and brilliance.
Did you know? White sapphire is frequently selected as a natural diamond alternative due to hardness and affordability.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: White Sapphire
Scientific classification: Oxide (Corundum Variety: Colorless Sapphire)
Hardness: 9 Mohs
Transparency: transparent
Lustre: vitreous
Crystal system: Trigonal
Primary colour: Colorless
Secondary colour: Near Colorless
Colour family: Whites & Neutrals
Corundum properties and lower dispersion than diamond help distinguish white sapphire.
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: very hard
Hardness value: 9 Mohs
Chemical composition: Aluminum oxide (Al2O3)
Crystal system: Trigonal
Common locations: Sri Lanka, Madagascar, Myanmar, Thailand, Australia
Learn more: Gem-A gemstone education resources.
Colour Variations
Colorless corundum known as white sapphire, often used as a diamond alternative.
Optical effects: None specified in the current dataset.
Detailed Gemology
Mineral species: Corundum (colorless sapphire)
Mineral group: Corundum group
Chemical formula: Aluminum oxide (Al2O3)
Mohs hardness: 9
Crystal system: Trigonal
Lustre: vitreous
Transparency: transparent
Streak: White
Cleavage: Variable by species/material
Fracture: Conchoidal to uneven
Specific gravity: 3.99-4.01
Refractive index: 1.76-1.77
Optical phenomena: None typically diagnostic
Colour range: Colorless to near-colorless
Common inclusions: Species-dependent inclusions and growth features
Geological environment: Species-dependent
Principal mining regions: Sri Lanka, Madagascar, Myanmar, Thailand, Australia
Important commercial sources: White sapphire is sourced from major corundum-producing localities worldwide
Historical significance: Recognized in gemological and lapidary trade.
Common treatments: Heat treatment may occur in some stones.
Synthetic or imitation forms: Imitations may exist depending on species.
Common look-alikes: Species-dependent look-alikes.
Jewellery uses: Used in engagement rings, fine jewelry, and durable accent stones.
Care recommendations: Excellent durability; standard gemstone care is suitable.
Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for White Sapphire.
Formation
Forms in metamorphic and igneous aluminum-rich environments.
Origin
White sapphire is sourced from major corundum-producing localities worldwide
Uses
Best for: Used in engagement rings, fine jewelry, and durable accent stones.
Ideal uses: Daily-wear jewelry requiring high hardness.
Care
Excellent durability; standard gemstone care is suitable.
Need another candidate? Use advanced gemstone search or return to the identification guide.
Related gemstones by colour
Related gemstones by hardness
Commonly confused gemstones
White Sapphire FAQ
How can I identify White Sapphire?
Compare hardness (9 Mohs), crystal system (Trigonal), colour profile, and lustre (vitreous) with your sample. Then cross-check related gemstones listed above.
What colour range does White Sapphire appear in?
Colorless corundum known as white sapphire, often used as a diamond alternative.
Where is White Sapphire commonly used?
Daily-wear jewelry requiring high hardness.. For maintenance, follow the care guidance in this profile.
Scientific References
GIA: general gemstone identity (reviewed) - Batch 09 factual verification pass.
Gem-A: gemological terminology and testing references (reviewed) - Batch 09 factual verification pass.
Mindat: mineral species and principal localities (reviewed) - Batch 09 factual verification pass.
International Gem Society: gem trade context and treatment overview (reviewed) - Batch 09 factual verification pass.