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  1. #31
    Inactive Senior Pearl-Guide.com Pearl Expert
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    Quote Originally Posted by CortezPearls View Post
    I would say the opened the oyster forcefully and with a big knife...which displaced the pearls to their odd location.

    I respectfully disagree. Byssal cysts are not uncommon. Here are four different examples.

    Although the sacs are thicker and singular, they present in the same manner.
    Attached Images Attached Images     
    Last edited by Lagoon Island Pearls; 10-06-2011 at 10:08 PM.

  2. #32
    Co-Founder: Cortez Pearls Senior Guide Member CortezPearls's Avatar
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    Wow! I stand corrected...but with Mussels. I have never seen these pearls in Pteriidae nor heard of anyone else seeing any in the bysuss. Maybe Josh can join us and tell us about his experience with Pinctada margaritifera.

    I have extracted "byssus pearls" from within the bysuss itself...but they are never plentiful (as the description) and certainly not shiny nor nacreous.

    Great Photos Dave and thank you for sharing them!
    Douglas McLaurin-Moreno
    Co-Founder Cortez Pearl Farm
    Guaymas, Sonora, Mexico
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    Your Life evolves in the same way a Pearl grows: with continuous layers of experiences/nacre that add to the Story of your Life on Earth and make you Unique and Beautiful.
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  3. #33
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    Quote Originally Posted by CortezPearls View Post
    I have never seen these pearls in Pteriidae nor heard of anyone else seeing any in the bysuss.
    Perhaps I'm comparing apples to oranges, although mussels are Pteriomorphia. It may be a case of wild v cultured, afterall the intertidal environment is big bad place sometimes as opposed to pampering in water column. I'm always VERY careful when removing mussels. I never pull or bend them, but snip the threads, leaving enough externally to rewire them back in place.

    Quote Originally Posted by CortezPearls View Post
    I have extracted "byssus pearls" from within the bysuss itself...but they are never plentiful (as the description) and certainly not shiny nor nacreous.
    Those have been my observations for the mostpart, as well. Most are proteinaceous, having concentric layers that are easily pulled appart, with no apparent nuclei. Some are cysts which are fluid filled, resembling the "milk" that is spun into byssal silk. I suspect hernias or prolapsed ducts as the cause. All of these types are very white, with a slight yellow tinge (a color not at all common in the hard pearls). Similar cysts though, yield jet black pearls (among the blackest of any blacks), as two of the images show. I've suspected those to be formed by parasites finding their way into the tissues via the orifice in the gland.

  4. #34
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    Thanks Dave and Douglas,

    at the end of this thread I think the 26 pearls of Lebanon may be cysts hardened by cooking, but even if they were pearls are even smaller and of smaller number of my pearls and also the shell is very small and without blister pearls.

    Despite all this news was published in major newspapers around the world and on hundreds of websites.

    The news of my discovery, much more significant, with certification of pearls by CISGEM and the movie of their extraction from the mother shell is only on this forum and some niche portals.

    Maybe there are other cases of similar finds of many pearls produced by a single shell genus Pinctada, someone can point them to me?

    Gianpiero Piva

    gppiva@libero.it

  5. #35
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    I want to point out that my article, in Italian and English, on the discovery of pearls has been published in "Argonauta", online magazine by “International Malacology Association” www.amimalakos.com , see link:

    http://www.amimalakos.com/argonauta/2011-7-12/pg026.htm


    I think the article may provide more detailed information.

    Gianpiero Piva

  6. #36
    Pearl Maven Senior Pearl-Guide.com Pearl Expert Caitlin's Avatar
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    Hey! Thanks for that info. I have to actually read it later- I'll get back.
    Caitlin

    How to hand-knot pearls without a tool

    My avatar is a Sea of Cortez mabe pearl. One of a pair of Mexican handmade earrings.

  7. #37
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    Default Classification of my Pinctada shell

    Dr. Monica Leonardi, of the Natural History Museum of Milan, has focused on the problem of classification of my shell, she says, with certainty, which is a Pinctada margaritifera and not believed to be reliable references to subspecies as "erythrensis" because there are not enough case studies that demonstrate the existence, she told me that the differences in color, size, shape and other, may depend on the marine environment and may characterize the examples of some areas.

    Gianpiero Piva

    gppiva@libero.it

  8. #38
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    I want to point out that a post, on my the discovery of pearls has been published by Adriano Genisi, an Italian gemmologist, GIA graduated see link:

    http://genisi.com/blog/en/senza-cate...single-oyster/

    Gianpiero

  9. #39
    Pearl Maven Senior Pearl-Guide.com Pearl Expert Caitlin's Avatar
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    Thanks for reporting that! I am glad it is getting some articles!
    Caitlin

    How to hand-knot pearls without a tool

    My avatar is a Sea of Cortez mabe pearl. One of a pair of Mexican handmade earrings.

  10. #40
    Pearl Scholar Senior Pearl-Guide.com Pearl Expert pattye's Avatar
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    Congratulations on this useful article being published and getting some recognition.
    Pattye


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    facebook.com/PatriciaSaabDesigns

    SO MANY PEARLS, SO LITTLE TIME----

  11. #41
    Co-Founder: Cortez Pearls Senior Guide Member CortezPearls's Avatar
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    Quote Originally Posted by pearls92 View Post
    I Want, please put me in touch with Ana Vasilu.

    Maybe I could directly send an email to dr. Checa, the address should be acheca@ugr.es

    Unfortunately Granada is far from Milan, you know a lab in Italy that can do the same analysis?

    Gianpiero Piva
    Sorry but I don't know of any Lab in Italy that specializes in pearls...but you can also contact Stefanos Karampelas at the Gubelin Gem Lab in Switzerland...that will be much closer to you I believe, maybe even just a drive away.

    Try this link for information: http://www.gubelingemlab.ch/Contact-Us/Contact-Us.php
    Douglas McLaurin-Moreno
    Co-Founder Cortez Pearl Farm
    Guaymas, Sonora, Mexico
    Website: www.perlas.mx
    Douglas McLaurin's Blog
    Sustainable Cortez Pearl Jewelry: www.perlas.mx
    Follow Me!
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    ]


    Your Life evolves in the same way a Pearl grows: with continuous layers of experiences/nacre that add to the Story of your Life on Earth and make you Unique and Beautiful.
    Douglas McLaurin-Moreno

  12. #42
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    Yesterday I handed my Pinctada with pearls to Stefanos Karampelas In Basel for scientific analysis and to ship the samples to other institutions, Stefanos Karampelas can choose the timing-time frame and the institutions around the globe to do the analysis.

    Thank you Douglas McLaurin for giving me the indication of Stefanos.

    Gianpiero Piva
    gppiva@libero.it

  13. #43
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    Below find a link with an article from Stefanos Karampelas on chemistry of my pearls as well as of others:

    https://www.mdpi.com/2075-163X/9/6/357

    My name is Gianpiero but in the acknowledgement section is Peter Piva.

  14. #44
    Natural Pearl Lover Senior Pearl-Guide.com Pearl Expert MSC's Avatar
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    Looking forward to reading the article, congrats!
    Check out my photos here
    Instagram: @ajs.joyful.images

  15. #45
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    Sorry MSC, but I cannot read your article,

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