These natural Silver White Pearls originate from China and their total weight is about 6 carats. The measurements are 6.2mm x 0mm (diameter x depth). The shape/cut-style of these Pearls is Drilled Sphere. These 6.14ctw Pearl gems are available to order and can be shipped anywhere in the world.
Cultured freshwater pearls are produced by mollusks, but the process is started by human intervention. Cultured reshwater pearls are less expensive because they are faster to produce with higher yields per mollusk. More about treatments
Pearls are products of bivalve mollusks (mainly oysters and mussels). They are built up of nacre (mother-of-pearl), which is mainly calcium carbonate in the form of aragonite crystals, and an organic horn substance known as conchiolin that binds the microcrystals concentrically around an irritant. Although pearls are not especially hard, only about 2.5 to 4.5 on the Mohs scale, they are extraordinarily compact and very difficult to crush.
The typical pearly luster is produced by the overlapping platelets of aragonite and film of conchiolin nearest to the pearl surface. The color of pearl varies with the type of mollusk and the water, and is dependent on the color of the upper conchiolin layer. Pearls may be natural (occuring without human intervention) or cultured; and they may occur in the ocean or in freshwater.
I have always been skeptical of ordering fine items online for fear of disappointment. Today, Thursday April 26, I received the blue sapphire which I ordered on Monday, April 23. Not only was I impressed with the rapid delivery of my sapphire, but I was very pleased with the way the stone was packaged and protected. The sapphire itself was far better quality than I had anticipated and it will make a beautiful centerpiece for the ring I'm having made. Thanks so much for the great experience...