Скачать или смотреть How to identify real original White coral |असली सफेद मूंगा की पहचान | Real V/s Duplicate White coral

How to identify real original White coral | असली सफेद मूंगा की पहचान | Real V/s Duplicate White coral 

About Coral

Coral is another material is organic origin unlike Amber, however, which seems to have lost
its popularity it is more in demand that ever. It is the branch like, calcareous frame work of
the Coral polyps and is formed in the accretion of colonics of the tiny marine animals. The
calcium carbonate is in the form of calcite, and the structure is radial from the centre of each
branch. The calcareous skeleton of a colony is fumly attached by a circular shaped "foot! to
any suitable or foreign object on the ocean floor. The nature of the cementing process is such
that the dislike foot provides a firm foundation for the entire structure. It is interesting to note
that a Coral colony unlike a plant, always grows in a direction perpendicular to. the surface to
which it is attached; if the initial attachment were on the underside of a rock for example, the
direction of growth would be downward. Confused with: Plastic, wax, conch pearl, ivory,
marble calcite.
Occurrence & Sources:
The favourable condition for coral to grow are depth ranging from 5 feet to 500 feet and
temperatures ranging from 13° to 16°. The most important source for fine material is the
Mediterranean Sea, the coasts of Tunis, Algeria, Morocco, Sardinia, and large parts of Italy.
It is also found on the shores of Corsica, Tatalonia and Province. Other sources include the
coastal waters of Ireland and Japan.
Varieties: There are three varieties of Coral
The so-called precious Coral (Corallium Rubrum or Corallium Noble) is of great
significance. It is usually found in light to dark stones of red to orangey red but sometimes it
appears more nearly orange flesh colored or white. The color is caused .by a small amount
(approximately 1%) of organic matter plus some iron oxide.
Another kind of Coral, a black variety known technically as Corallium Nigrum. is composed
almost entirely of conchiolin. Sometimes called "King's Coral", it is used almost exclusively
-in the Orient
A third type, Blue Coral, which was once found in Africa, in now almost unknown