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Pearl Treatments

Pearl Treatments After Harvesting

After harvest, pearls are always processed in one way or another. Akoya and freshwater pearls are routinely bleached, and all pearls are cleaned and polished before sale. However, there are treatments that should be noted with cultured pearls that change the aesthetic qualities of the gem.

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Pearl Grading

Freshwater, Tahitian, & Akoya Pearls



Pearl Grading System

Pearl grading is very similar to the 4C's of diamond grading in that it takes into consideration several categories of qualitative comparisons. The pearl grading system consists of five main parts. They are:

Pearl Farming

What Is Pearl Farming?

Cultured pearls are grown on what are known as pearl farms. Several thousand oysters are nucleated and then cared for during the 2-5 years required for a pearl to grow and develop. Like any other form of farming, pearl farming can be as dependent on luck as it is on skill.

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Pearl Composition and Chemistry

Natural Pearls

A pearl is a hard, rounded object produced by certain mollusks, such as oysters. The pearl is a valued gemstone and is cultivated or harvested for jewelry. Natural pearls are formed when a small foreign object, such as a parasite, grain of sand, or piece of food, lodges itself in the gonad or mantle tissue of a mollusk or oyster. When the mollusk is invaded by a foreign object that the animal cannot eject, a process known as encystation entombs the offending entity in successive, concentric layers of 'nacre' (nay'ker). In a defensive response to the irritant, the mollusk secretes nacre as a smooth, protective coating.

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Natural Pearls

Natural Pearls - Accidents of Nature

Natural pearls are formed randomly and really are simple accidents of nature. When a certain type of irritant, such as a parasite, becomes lodged in the tissue of a mollusk, the animal responds by secreting a calcium carbonate substance called nacre to coat the intruder and protect the mollusk. Over a period of several years, this build-up of nacre forms a natural pearl.

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Who are we?

The Geohavens name is an assurance of timeless beauty, distinct quality and uncompromising value. The Company spares no effort in sourcing from the farthest markets and the deepest mines in order to unearth the most attractive gems.

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