Gemstone profile and identification guide
South Sea Pearl
South Sea pearl is a premium saltwater cultured pearl category known for large size and satin-like luster.
Profile Navigation
Overview
South Sea pearl is a premium saltwater cultured pearl category known for large size and satin-like luster.
Did you know? South Sea pearls are among the largest commercially cultured pearls.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: South Sea Pearl
Scientific classification: Organic Gem Material (Saltwater Cultured Pearl)
Hardness: 3 Mohs
Transparency: opaque
Lustre: pearly
Crystal system: Biogenic aragonite/calcite aggregate
Primary colour: White
Secondary colour: Golden
Colour family: Whites & Neutrals
Type should be disclosed as cultured South Sea with origin and treatment details when available.
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 notes where applicable.
Physical Properties
Hardness category: soft
Hardness value: 3 Mohs
Chemical composition: Calcium carbonate with conchiolin
Crystal system: Biogenic aragonite/calcite aggregate
Common locations: Australia, Indonesia, Philippines, Myanmar
Learn more: Gem-A gemstone education resources.
Colour Variations
Large saltwater cultured pearls in white, silver, and golden tones.
Optical effects: Orient
Detailed Gemology
Mineral species: Biogenic cultured pearl material
Mineral group: Organic gem materials
Chemical formula: Calcium carbonate with conchiolin
Mohs hardness: 3
Crystal system: Biogenic aragonite/calcite aggregate
Lustre: pearly
Transparency: opaque
Streak: White
Cleavage: Not applicable
Fracture: Uneven
Specific gravity: 2.60-2.85
Refractive index: Spot values commonly near 1.53
Optical phenomena: Orient and nacre luster
Colour range: White, silver, cream, gold
Common inclusions: Surface growth marks and nacre texture features
Geological environment: Marine pearl aquaculture environments
Principal mining regions: Australia, Indonesia, Philippines, Myanmar
Important commercial sources: South Sea pearls are saltwater cultured pearls from Pinctada maxima farming regions
Historical significance: Premium modern pearl category in global luxury jewelry markets.
Common treatments: Bleaching and luster enhancement can occur.
Synthetic or imitation forms: Shell pearls, glass pearls, and coated imitations exist.
Common look-alikes: Imitation pearls and lower-nacre cultured products
Jewellery uses: Used in high-end strands, pendants, and earrings.
Care recommendations: Soft and chemical-sensitive; wipe after wear and avoid perfume/acid contact.
Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for South Sea Pearl.
Formation
Cultured in marine oysters via nucleation and nacre deposition over time.
Origin
South Sea pearls are saltwater cultured pearls from Pinctada maxima farming regions
Uses
Best for: Used in high-end strands, pendants, and earrings.
Ideal uses: Fine pearl jewelry with careful maintenance.
Care
Soft and chemical-sensitive; wipe after wear and avoid perfume/acid contact.
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
South Sea Pearl FAQ
How can I identify South Sea Pearl?
Compare hardness (3 Mohs), crystal system (Biogenic aragonite/calcite aggregate), colour profile, and lustre (pearly) with your sample. Then cross-check related gemstones listed above.
What colour range does South Sea Pearl appear in?
Large saltwater cultured pearls in white, silver, and golden tones.
Where is South Sea Pearl commonly used?
Fine pearl jewelry with careful maintenance.. For maintenance, follow the care guidance in this profile.
Scientific References
GIA: general gemstone identity (reviewed) - Batch 08 factual verification pass.
Gem-A: gemological terminology and testing references (reviewed) - Batch 08 factual verification pass.
Mindat: mineral species and principal localities (reviewed) - Batch 08 factual verification pass.
International Gem Society: gem trade context and treatment overview (reviewed) - Batch 08 factual verification pass.