A few reasons for this difference
Friday, September 19th, 2008A few reasons for this difference, one the freshwater pearl is easier to grow. Freshwater pearls are easier to grow because the process of nucleation is different and easier. The amount of nucleation per mollusk is much more in the freshwater pearl mussel (at one time 40 to 50) the most an akoya can produce might be 4 or 5 and they do not that often because quality goes down and mortality goes up. Freshwater mussels can be nucleated again with less mortality than the one time for akoyas. There is more control over the environment, ponds and streams as opposed to ocean water, which has typhoons and red tides to contend with.
Of course, Akoya Pearls are mostly round in shape.And needless to say, Freshwater pearls are rarely round shaped.The Akoya is nucleated with a round bead made from a freshwater mussel shell that is made round to begin with. The Freshwater mussel is nucleated with a piece of soft tissue, usually just a flat piece, or many flat pieces.
The freshwater pearl earring is solid nacre.
Here is something you might not know about…an Akoya Pearl Necklace has a bead core made of shell and only a coating of nacre, as thin as 1mm.
See above, the soft tissue that the freshwater mussel is nucleated with is absorbed leaving a pearl of solid nacre, more like natural pearls. The Akoya is nucleated with a shell bead of some size, and only allowed to develop nacre for a limited time before harvesting. The length of time is limited only by the cultivator’s desire for quicker harvests.
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