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Chinese Name:紅色海綿珊瑚
English Name:Red Spongy Coral
Chemical Composition:mainly consists of Calcite (Calcium Carbonate)CaCO3
Crystal System:Amorphous, Organic Material
Hardness:~ 3.5 to 6
SG:~ 2.65
RI:1.49 - 1.66
Related Chakra:Heart, Sacral
Locality:Indo-pacific region
Colour: Orange to Red
Remarks:
Coral is secreted by animals called coral polyps. Since the appearance of the coral looks like spongy, thus it call "spongy coral"
Coral is the supporting structure for the body of the polyp, which lives in a rigid skeleton or 'cup'.
Some colonial corals build structures known as reefs, which are the accumulated supporting structures of successive generations of polyps.

 
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Functions:
1. Good for skin, hair and nails.
2. Good for bone health, especially for kids.
3. A kind of love stone.
4. Adjust & regulate menstruation.
5. Imporve Kidney/bladder problems
6. Red & pink corals are good for nervous system and heart diseases.
   
General care:
1. Avoid contact with perfumes, hair spay, make-up.
2. Gem can be scratched easily, so wear with caution.
3. Avoid knocks.
4. Avoid direct sunlight or heat for a long period of time.
5. Do not soak in jewellery cleaner.
6. Avoid contact with household cleaners.
7. Avoid using ultrasonic and steam cleaners.
8. Cleaning: Use lukewarm plain water and a soft brush to scrub behind the stone where dirt can collect.

Types of Coral

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Precious Coral
Precious Coral are part of the genus Corallium family of hard corals, mainly consists of Calcite (Calcium Carbonate)CaCO3
 
Colour: Red, Pink, Orange and White
Locality: Mediterranean、Japan South
Hardness: 3.0 - 4.0
SG: 2.60 - 2.70 (white & red)
RI: 1.486 - 1.658

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Black & Golden Coral
Balck and Golden Coral is formed mainly from organic material (Conchiolin/horny),contain little or none Calcium Carbonate
 
Colour: Black, Golden
Locality:: the West Indies, Hawaiian Islands, Australia and in Southern waters towards Antarctica
Hardness: 2.5 - 3.5
SG: 1.37

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Soft Coral (Spongy Coral)
mainly consists of Calcite (Calcium Carbonate)CaCO3
 
Colour: Orange to Red, Blue
Locality: Indo-pacific region
Hardness: ~ 3.5 to /6
SG: ~ 2.65
RI: 1.49 - 1.66

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Fossilized Coral
Fossilized by the replacement of the coral by calcite or quartz
 
Colour: All kinds of colour
Locality: Indonesia、USA(Florida and Georgia)、Morocco
Hardness: 6.5 - 7.0
SG: 2.60 - 2.64
RI: 1.53 - 1.54
Address: B26, 1/F, San Po Kong Plaza, 33 Shung Ling Street, San Po Kong, Kowloon, HK
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