Coral is one of the most precious stones, although it is not of metal materials, but is one of the animal materials (organic). Coral is one of the most ancient organic materials in use in the jewelry industry, where he remained for twenty centuries Coral ranks with precious stones, but has lost some of its popularity for a certain period, and then began to regain its stature and popularity in recent years. The coral is made up of calcium carbonate.
Spread world's most important fisheries, which is extracted from coral on some shores of the Mediterranean, where the traditional supplier of coral, Near the shores of this sea around the islands on the coral colonies spread significantly, she is living at different depths, some of which is found in shallow water, which does not increase its depth about 50 feet while others exist at depths of up to more than 1,000 feet [3]. Publishes traps red coral on the shores of Tunisia, Algeria and Morocco, as some of them found on the southern coast of France and around the Mediterranean islands, such as Sardinia and Sicily and Korsiqa Islands.
Coral special care required, and because it is soft stones, so you should exercise some reservists for wearing it, as recommended saved in a separate place, or in a special fabric with precious stones put in a special fund some away from the most hardened gems. [4] The acids must stay away them, and not to endanger the coral to these acids because they Taatfah no matter how diluted, as easily interact with calcium carbonate constituents, so it must not be exposed to such materials are also (vinegar or lemon juice, or even soap and sweat some objects). I have pointed to this fact the Arab world Jeweler (Altavasche) in his book values "flowers of ideas in jewels stones", saying: "If you were in an empty because the white." As mentioned (Altavasche) is also a way to treat these defects, saying: "If it was in the fat showed Hmrth and shone and good color and act in reaction against the vinegar." But from a scientific point of coral that upwind of color in hydrogen peroxide acid until it regains its color is placed. And total hardness on the Mohs scale of hardness 3.5 [5].
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