The pearls that are artificially cultivated in oysters by planting a core or nucleus into pearl oysters are cultured pearls. Kokichi Mikimoto in Japan first developed this pearl culturing process in 1896. The original Japanese cultured pearls are known as akoya pearls. Akoya pearls are commonly known as cultured saltwater pearls. The cultured pearls are also produced using abalone.
The freshwater pearls are farmed using the pearl mussels. The fresh water pearl farming began in 1914 at Lake Biwa. Since then the phrase biwa pearls has become synonymous with freshwater pearls. The baroque pearls are simply pearls that are not round and have an undefined shape. The freshwater pearls are most commonly baroque pearls. The freshwater pearls are characterized by the reflection of rainbow colors in the luster. Organically a pear is composed of calcium carbonate and conchiolin. This combination of these compounds is known as nacre or mother of pearl.
The pearls are usually white, but sometimes with a creamy or pinkish tinge, may be tinted with yellow, green, blue, brown, purple, or black. The precious black pearls, frequently dubbed, as tahitian pearls are highly valued because of their rarity.
The value of the pearls in jewelry depends on their luster, color, size, lack of surface flaw and symmetry. The pearl jewelry is quite in vogue today. The fresh water pearl jewelry may include pearl earring, pearl necklace, pearl ring, pearl bracelet, black pearl necklace, pearl pendant, black pearl earring, pink pearl jewelry etc.
The blue pearl, green pearl, white pearls, purple pearls, pink pearls, black pearls and discount pearls are some highly coveted pearls for jewelry.