Stone 07 · Gemstone guide
Red Coral
Moonga · Pravala
Precious coral is an organic gem material built from the calcareous skeletons of marine coral colonies. Its fine-grained structure takes a polish, but its softness and environmental context require careful handling and precise disclosure.
Gemological register
- Material
- Organic gem material
- Composition
- Calcium carbonate with organic matter
- Structure
- Fine-grained aggregate
- Mohs hardness
- About 3 to 4
- Refractive index
- About 1.49 by spot reading
- Specific gravity
- Commonly about 2.60 to 2.70
Colour
Colour is a range, not a shorthand.
Precious coral may be red, pink, orange, white or other related tones. Colour can be uneven, and dyed material can imitate more saturated natural colour.
Clarity and character
Read inclusions in context.
Growth lines, pits and a visible granular structure can occur. Surface polish and the absence of destabilising cracks matter more than crystalline clarity language.
Treatment disclosure
Ask what changed and how it was detected.
Dye, wax, polymer impregnation, coating and reconstruction may alter colour or surface appearance. The species, natural or reconstructed structure and any treatment should be described separately when determinable.
Setting practice
The mount answers the material.
Coral should be isolated from hard gem edges and protected from sharp metal pressure. Smooth bezels, cups or carefully fitted pins reduce abrasion and distribute force.
Care
Care follows the individual record.
Wipe with a soft damp cloth and keep away from acids, perfume, cosmetics, heat and ultrasonic or steam cleaning. Store apart from harder gems that can scratch the surface.
Sourcing questions
Questions worth carrying to the desk.
- 01Is the material precious coral, another coral type or an imitation?
- 02Is it natural, reconstructed, dyed, coated or impregnated?
- 03What species and geographic documentation is available?
- 04Does the supplier provide lawful and responsible sourcing records?
Kundali note
Red coral is traditionally associated with Mangala in Jyotish. Material suitability and responsible sourcing are reviewed independently of any chart interpretation, and no outcome is promised.
Traditional association and gemological assessment remain distinct parts of a conversation. No material is presented as an outcome guarantee.
Read the consultation process →Individual assessment
Ask about a stone, setting or record.
Bring the object, report language or sourcing question you want to study. The next step is a direct conversation.
Begin a conversation