This natural Silver White Pearl originates from China and its weight is about 4 carats. The measurements are 8.5mm x 0mm (diameter x depth). The shape/cut-style of this Pearl is Half-Drilled Sphere. This 4.24ct Pearl gem is 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 known about GemSelect for a while but this is my first purchase because I am a jewelry maker in the market for lower-priced gems that I can resell in jewelry. It's difficult to make much of a profit on cheaper jewelry when the shipping price is sometimes half of the total cost of the stone. I would make more purchases if I was in the market for a lot of higher-priced gems, but for now it will be just every once in a while that I shop here.
That being said, I think that the prices for gems are fair and I will continue shopping with GemSelect for my higher-priced gems that I make for myself or for orders that want specific gems that I can only find here.