Gemstone profile and identification guide
Blue Coral
Blue Coral is a Blue organic prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.
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Overview
Blue Coral is a Blue organic prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: Blue Coral
Scientific classification: Organic
Hardness: 2.5 Mohs
Transparency: opaque
Lustre: vitreous
Crystal system: Nacreous
Primary colour: Blue
Secondary colour: Orange
Colour family: Blues & Cyans
Physical Properties
Hardness category: soft
Hardness value: 2.5 Mohs
Chemical composition: Calcium carbonate and conchiolin
Crystal system: Nacreous
Common locations: Japan, Australia, Tahiti, China
Learn more: Gem-A gemstone education resources.
Colour Variations
Blue Coral is classified within the blues & cyans palette. Primary colour: blue. Secondary colour: orange.
Optical effects: None specified in the current dataset.
Formation
Forms inside mollusk shells as layers of nacre coating an irritant.
Origin
Japan, Australia, Tahiti, China
Uses
Best for: Soft jewellery, heirloom carvings, and delicate accessories.
Ideal uses: Gentle settings and occasional wear.
Care
Avoid acids and drying. Store separately and clean with a damp cloth.
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Blue Coral FAQ
How can I identify Blue Coral?
Compare hardness (2.5 Mohs), crystal system (Nacreous), colour profile, and lustre (vitreous) with your sample. Then cross-check related gemstones listed above.
What colour range does Blue Coral appear in?
Blue Coral is classified within the blues & cyans palette. Primary colour: blue. Secondary colour: orange.
Where is Blue Coral commonly used?
Gentle settings and occasional wear.. For maintenance, follow the care guidance in this profile.
Scientific References
Reference data from GIA and Mindat mineral records.