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  1. hacostas

    It's Official - Cultured Conch Pearls

    not now. hopefully in the near future.
  2. hacostas

    It's Official - Cultured Conch Pearls

    scallop pearls ;)
  3. hacostas

    Culturing Conch Pearls

    This is a summary of what was presented at the World Aquaculture ’09 conference. The juvenile conch (90-110 mm shell length) used to grow these +200 pearls were hatchery produced. They were –as Jeremy mentioned- relaxed in 30 g per L of magnesium chloride in seawater. They were seeded and then...
  4. hacostas

    Culturing Conch Pearls

    It's been a year already!? time flies. It was a good experience for us at HBOI to have Jeremy Shepherd, Jeremy Norris and Wuyi Wang touring our little queen conch research facility. We've had other important guests but I'm not sure if I can disclose their names. I'm happy that finally FAU...
  5. hacostas

    Golden Akoya Pearls

    It was in the mid 90s that they produced 'white oysters' to use as mantle donors (or at least it was when they published it). And they significantly improved the numbers of white colored pearls. The same rationale was used for these earlier experiments, that a crop with too many yellows was not...
  6. hacostas

    Golden Akoya Pearls

    Hi Jeremy I think these are way too gold to be within the natural color range of akoyas. However, this producer may have a very inbred stock of gold akoyas selected for such color over a number of generations. If they bred the yellow color out of their oysters to produce whiter pearls, why...
  7. hacostas

    Thanks Caitilin. I try to be up-to-date on pearls. I?ll get some photos and will post them one...

    Thanks Caitilin. I try to be up-to-date on pearls. I?ll get some photos and will post them one day. GemGeek, I agree, the pearl book is good, we needed something like it. Cheers
  8. hacostas

    Tom Stern's natural pearls

    It is indeed interesting. However, I would say your pearls are from other Pteria species that do distribute in the Indopacific. There's at least half a dozen species of Pteria living around these waters. You should get a photo of a Pteria sterna from the Indopacific, that would be the first...
  9. hacostas

    Tom Stern's natural pearls

    Pteria sterna does not occur naturally in Celebes waters. And there are no reports of Pteria sterna being found anywhere other than in the Pacific coast of the Americas. These two pearl oysters do not share any part of their geographic distribution. The pearl CHAPTER by Wada and Temkin in the...
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