Gemstone profile and identification guide
Yellow Apatite
Yellow apatite is a calcium phosphate gem variety valued for bright yellow color.
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Overview
Yellow apatite is a calcium phosphate gem variety valued for bright yellow color.
Did you know? Apatite can occur in many colors, but yellow transparent gems remain niche in mainstream jewelry.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: Yellow Apatite
Scientific classification: Phosphate (Apatite Color Variety)
Hardness: 5 Mohs
Transparency: transparent
Lustre: vitreous
Crystal system: Hexagonal
Primary colour: Yellow
Secondary colour: Golden Yellow
Colour family: Oranges & Yellows
Apatite optical constants and lower hardness differentiate it from topaz and 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.
Final remaining profile set completed in targeted pass.
Physical Properties
Hardness category: medium
Hardness value: 5 Mohs
Chemical composition: Calcium phosphate [Ca5(PO4)3(F,Cl,OH)]
Crystal system: Hexagonal
Common locations: Madagascar, Brazil, Mexico, Myanmar
Learn more: Gem-A gemstone education resources.
Colour Variations
Yellow apatite in light to saturated yellow tones.
Optical effects: None specified in the current dataset.
Detailed Gemology
Mineral species: Apatite
Mineral group: Apatite group
Chemical formula: Calcium phosphate [Ca5(PO4)3(F,Cl,OH)]
Mohs hardness: 5
Crystal system: Hexagonal
Lustre: vitreous
Transparency: transparent
Streak: White
Cleavage: Variable by species/material
Fracture: Conchoidal to uneven
Specific gravity: 3.1-3.2
Refractive index: 1.63-1.65
Optical phenomena: None typically diagnostic
Colour range: Lemon to golden yellow
Common inclusions: Species-dependent inclusions and growth features
Geological environment: Species-dependent
Principal mining regions: Madagascar, Brazil, Mexico, Myanmar
Important commercial sources: Yellow apatite is sourced from several phosphate-rich gem localities
Historical significance: Recognized in gemological and lapidary trade.
Common treatments: Treatment status varies by product; disclose when present.
Synthetic or imitation forms: Imitations may exist depending on species.
Common look-alikes: Species-dependent look-alikes.
Jewellery uses: Used in faceted collector gems and protected jewellery settings.
Care recommendations: Yellow Apatite should be cleaned with lukewarm water, mild soap, and a soft brush. At Mohs 5 in the Hexagonal system, avoid steam cleaners, harsh chemicals, and high-impact wear. Protect cleavage directions from sharp knocks during wear and setting.
Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for Yellow Apatite.
Formation
Forms in igneous, metamorphic, and hydrothermal phosphate systems.
Origin
Yellow apatite is sourced from several phosphate-rich gem localities
Uses
Best for: Used in faceted collector gems and protected jewellery settings.
Ideal uses: Occasional-wear bright-yellow gems.
Care
Yellow Apatite should be cleaned with lukewarm water, mild soap, and a soft brush. At Mohs 5 in the Hexagonal system, avoid steam cleaners, harsh chemicals, and high-impact wear. Protect cleavage directions from sharp knocks during wear and setting.
Need another candidate? Use advanced gemstone search or return to the identification guide.
Related gemstones by colour
Related gemstones by hardness
Gemstones from the same mineral family
Commonly confused gemstones
Yellow Apatite FAQ
How can I identify Yellow Apatite?
Compare hardness (5 Mohs), crystal system (Hexagonal), colour profile, and lustre (vitreous) with your sample. Then cross-check related gemstones listed above.
What colour range does Yellow Apatite appear in?
Yellow apatite in light to saturated yellow tones.
Where is Yellow Apatite commonly used?
Occasional-wear bright-yellow gems.. For maintenance, follow the care guidance in this profile.
Scientific References
GIA: general gemstone identity (reviewed) - Batch 10 factual verification pass.
Gem-A: gemological terminology and testing references (reviewed) - Batch 10 factual verification pass.
Mindat: mineral species and principal localities (reviewed) - Batch 10 factual verification pass.
International Gem Society: gem trade context and treatment overview (reviewed) - Batch 10 factual verification pass.