Coral is a stone that occurs in warm seas. It consists of fossilized water polyps. Thanks to these organisms there are tree stones that make up the reefs and Islands. If you look at the photos of these amazing formations, you can come to the indescribable delight of their beauty. In its natural form to see coral reefs and Islands is a real happiness. The word "coral" comes from the Greek word "collation». So in Ancient Greece called sea polyps. Characteristic of the stone-an opaque mineral, which includes calcium and aragonite. Coral is fragile and it can break high temperature and acid. It can be precious and semi-precious. The more porous the stone, the lower its value. These stones are in great demand among jewelers. They are processed, and then acquire a glass Shine and smoothness.