pearl jewelry wholesale

Though classified as a gemstone, pearls are extremely unique, largely due to the fact that they are the only gem material formed and found within a living creature. A large amount of nacre that forms around the irritant over time eventually becomes a pearl. How pearls are graded? Pearls are a smooth, rounded bead formed within the shells of certain mollusks and composed of the mineral aragonite or calcite in a matrix, deposited in concentric layers as a protective coating around an irritating foreign object: valued as a gem when lustrous and finely colored. Cultured Akoya and Freshwater pearls are graded according to Surface Quality, Luster, and perfection of Shape (roundness and symmetry). Akoya pearls are also graded on Nacre Thickness, which is a visual inspection completed by the grader rather than via x-ray analysis. The three main categories of shape are spherical, symmetrical, and asymmetrical (semi-baroque and baroque). Pearls come in seven basic shapes: round, near-roun