Description

Coral stone 6.70ct

Description

This Coral is natural gemstone which is Red color, it’s Originates from Italy and its exact weight is 6.70ct the measurements are 13.09×9.32×6.26mm the shape and cut of this stone are Oval Cabochon. It’s graded Opaque and clarity is Good. This 6.70ct Red Natural Coral Gem is available for ready to ship anywhere in the world. You can also select Certification and shipment method as optional.

Details

Coral stone 6.70ct

Properties Of  Coral Stone

Chemical Composition:  CaCO₃, Calcium carbonate – organic

Hardness:  3 to 4

Specific Gravity (Density):  2.60 to 2.70

Refractive Index:   1.486 to 1.658

About Coral stone

Coral is an organic material and like other organic gemstones, it is not an especially hard or durable gemstone. Coral is a gemstone-quality variety of natural coral, closely related to reef-building ‘stony’ coral. Most coral gemstones available today are varieties of Corallium rubrum, a very specific pink to red colored species of the coral genus. Coral typically exhibits a range of warm pinkish to red colors, including light-red to salmon and medium-red to deep ox-blood red color is known to fade when worn. Coral is typically translucent to opaque. When unworked, it has a naturally dull, matte luster. Polished coral exhibits an attractive vitreous luster. Coral is most often cut en cabochon due to its softness and opacity. It is popularly used for beads, ornamental carvings, and sculptures. Natural coral is typically untreated, but some materials may be dyed to achieve a more valuable color. There are a variety of other materials used to imitate coral, such as glass, bone, conch shell and plastic. Coral is also found in the Red Sea, the Bay of Biscay, the Malaysian Archipelago, the Midway Islands, Japan, Taiwan, Australia and the Hawaiian Islands. Precious coral from Hawaii, coastal Japan, the Mediterranean and the Red Sea is considered to be the finest coral of today.