Handmade. 100% natural coral beads are meticulously polished using advanced technology, giving them a beautiful sheen. Decorative turquoise and cylindrical spacer beads are made of a strong acrylic material for secure bonding. Naturally beautiful coral is tested by a jeweler, but you can also check for real coral yourself: rub it against your tooth; the surface will be rough like sand if it's real, and if it's not, it will feel very smooth, like glass or plastic. This is an ancient method of determining whether it's coral, a pearl, or a natural stone. Length / Circuit: 84 cm Diameter coral pearls: 8.0 mm Total weight: 81,8 grams Natural gem corals are found in the Mediterranean Sea, Persian Gulf, Australia, Japan, Malaysia, Korea, Hawaii, China, and Ireland. Gem coral ranges from semi translucent to opaque and occurs in white, pink, orange, red, blue, violet, golden, and black. A pale, rose-colored coral from Japan is called "boke."The most valued type of coral is the noble red coral (Corallicum rubrum). The color is uniform throughout the branch, from soft pink to dark red, sometimes white or pink spotted. The red color is caused by iron oxide or may be organic partly or both. "Arciscuro" or "Carbonetto" is an Italian color grade classification for very dark red coral. "Blood coral" is a term used for intense precious red coral. Other red classifications include "Pelle d'angelo" which is rose-red, "Rose pallido" a pale rose color coral, "Rosa vivo" a bright rose, "Secondo coloro," which is salmon rose, and "Rosso scuro," a dark red.This coral you buy is "Secondo coloro," which is salmon rose, so is (Corallicum rubrum) but I really don't know what sea it's from. The beads are very highly polished and have a very nice shine and a vitreous luster, so it is hard and Bamboo coral is very soft.In the unworked state, coral is dull or has a waxy luster, but when polished has a vitreous luster. It is usually found on the coasts of the Mediterranean, Bay of Biscay, Canary islands, Midway Islands (Japan). Bamboo coral, a commercial term for coral suitable for jewelry, is fished from the waters of Tasmania, Australia and has a structure similar to bamboo. Shipping registered.