Page 2 of 58 FirstFirst 12341252 ... LastLast
Results 16 to 30 of 858

Thread: Nautilus pearl

  1. #16
    CLICLASP
    Guest

    Default

    Quote Originally Posted by DrTKStern View Post
    ........... there is a common object known near Australia as le coque de perle, which is carved from the central whirl where the shell is quite white....
    I would like very much to see a pict. of a coq de perle ounce

  2. #17
    Jnorris
    Guest

    Default Word to the wise

    I have seen a number of miscalls on Tridacna pearls coming from the swiss lab (ssef) and a few from Gubelin. On these certs the labs referred to the tridacna as Nautilus repertus. Conformation by (GIA)on any pearl being sold as nautilus is advised.

    Best Regards.
    Jeremy

  3. #18
    First-graft Pearl
    Join Date
    Aug 2008
    Location
    Dominican Republic
    Posts
    108

    Default

    Quote Originally Posted by Caitlin View Post
    Here is a peeled nautilus shell showing the osmina core
    Very nice! Is it just my imagination or is the nautilus shell on page 111 of Strack peeled as well? Whether it is or not, it is so striking that a quick trip to Dresden to see it would be in order.

  4. #19
    CortezPearls
    Guest

    Default

    Any creature capable of producing shell is also capable of producing "pearls" (or calcium concretions). Cephalopods like the Nautilus are indeed rare (and rarer every year) so finding a pearl in one (let alone two!!!) is much better than finding a sunken ship loaded with treasure.

    This is the ultimate freak of Nature...I would love to see those pearls...

  5. #20
    Rare Pearl Senior Pearl-Guide.com Pearl Expert
    Join Date
    Sep 2006
    Location
    Bucharest, Romania
    Posts
    2,068

    Default

    Pictures still welcome?

    CLICK for Nautilus pearls (and more)

  6. #21
    Natural Pearl Senior Pearl-Guide.com Pearl Expert smetzler's Avatar
    Join Date
    Jan 2007
    Location
    Seattle
    Posts
    1,699

    Default

    Quote Originally Posted by Valeria101 View Post
    Pictures still welcome?

    CLICK for Nautilus pearls (and more)
    Yes, thanks! Great link, and some truly great pearls. Nautilus examples have exceptionally fine porcelain-esque surfaces, contradicting reported photos in Elisabeth Strack's presentation at Tucson last week showing Nautilus pearls of nacreous composition.
    Last edited by smetzler; 02-17-2009 at 04:30 PM.
    Steve
    ============

  7. #22
    New Member
    Join Date
    Feb 2005
    Location
    California
    Posts
    34

    Default

    This is a good example of pearls from Tridacna squamosa being represented as Nautilus pearls. Like Strack I believe that Nautilus pearls will be of a nacreous composition there by mirroring the interior of the shell.

  8. #23
    Pearlista Senior Pearl-Guide.com Pearl Expert GemGeek's Avatar
    Join Date
    Sep 2006
    Location
    Oceanside, CA
    Posts
    9,463

    Default

    I have to agree with Jeremy. There is discussion, even among labs, that these are being mis-identified. There hasn't been a single pearl found in the flesh of a nautilus. They are always found on their own and almost all are non-nacreaous. This may be going before the lab harmonization committee for research and that may be why no one wants to make an official declaration. Very interesting.

  9. #24
    thou shall read the book Senior Guide Member effisk's Avatar
    Join Date
    Oct 2005
    Location
    Bordeaux, France
    Posts
    410

    Default

    Quote Originally Posted by GemGeek View Post
    I have to agree with Jeremy. There is discussion, even among labs, that these are being mis-identified. There hasn't been a single pearl found in the flesh of a nautilus. They are always found on their own and almost all are non-nacreaous. This may be going before the lab harmonization committee for research and that may be why no one wants to make an official declaration. Very interesting.
    The GIA lab in Thailand (Ken Scarratt) has certified 4 pearls as nautilus pearls, one of them being from the paper nautilus
    http://en.wikipedia.org/wiki/Argonaut_(animal)
    (I'm not 100% sure of that info but T. Stern can probably confirm?)

    It would be bold from the GIA to certify such pearls as nautilus pearls without strong proof.
    Last edited by effisk; 02-21-2009 at 05:52 PM. Reason: fixed link

  10. #25
    Pearlista Senior Pearl-Guide.com Pearl Expert GemGeek's Avatar
    Join Date
    Sep 2006
    Location
    Oceanside, CA
    Posts
    9,463

    Default

    The paper nautilus pearl would certainly be nacreous. Maybe that is the photo that Elisabeth Strack showed? Such a mystery.

  11. #26
    Natural Pearl Senior Pearl-Guide.com Pearl Expert smetzler's Avatar
    Join Date
    Jan 2007
    Location
    Seattle
    Posts
    1,699

    Default

    Quote Originally Posted by GemGeek View Post
    The paper nautilus pearl would certainly be nacreous. Maybe that is the photo that Elisabeth Strack showed? Such a mystery.
    In which case, we're back where we started, according to the background available on this site (bold face is mine):

    The Paper Nautilus or Argonaut, Argonauta argo, is a Cephalopod mollusc that lives a pelagic existence in the tropics and subtropics. Despite its name, the shell of the Paper Nautilus is not made from paper; the shell is "paper thin" (i.e., very fragile) and constructed of calcium carbonate (like most seashells) only by the female of the species and only for purposes of protecting her eggs. Additionally, the Paper Nautilus is not a nautilus at all, but rather is a member of the order Octopoda (which includes the octopusses) and family Argonautidae
    Steve
    ============

  12. #27
    Pearlista Senior Pearl-Guide.com Pearl Expert GemGeek's Avatar
    Join Date
    Sep 2006
    Location
    Oceanside, CA
    Posts
    9,463

    Default

    You're right!

  13. #28
    Magnificent Pearl Guru Senior Pearl-Guide.com Pearl Expert
    Join Date
    May 2006
    Location
    Canada
    Posts
    1,202

    Default

    A sea argonaut! Cute! An octopus that makes an egg case(the shell) to protect its larvae from predators and U.V. rays. The octopus uses the bubbles formed around the eggs to control boyancey and to act like a rudder. How fascinating is that?

    Yup, it's really more of an octopus than a nautilus. Can an octopus that makes a paper thin egg case of a shell, also make a roundish concretion? Does anyone know if the egg case is at all nacreous? If so, how nacreous? Are the supposed "pearls" being found within the paper thin egg case? or in the octopus' head or something?

    What a cool crib it has.

    Slraep
    Last edited by Slraep; 02-18-2009 at 08:15 PM.

  14. #29
    Magnificent Pearl Guru Senior Pearl-Guide.com Pearl Expert
    Join Date
    May 2006
    Location
    Canada
    Posts
    1,202

    Default

    Looks like it has a shiny porcelaneous interior, but not nacreous. Hard to tell as I do not have one of these shells in my collection. If the interior of the shell is not nacreous and it might, maybe, possibly, by a long shot, be able to make an Argonauta a. concretion, the concretion wouldn't have any iridescent nacre. By contrast, any concretion coming from the Nautilus p. would have highly iridescent nacre.

    http://www.specimenshells.net/2938.htm
    Last edited by Slraep; 02-18-2009 at 08:12 PM.

  15. #30
    New Member pearlshooter's Avatar
    Join Date
    Feb 2009
    Location
    Based in Sydney Australia
    Posts
    15

    Default Nautilus pearl

    I know this is a very old thread but I wanted to add some info about the nautilus pearl.
    I found this site because I wanted to see if there was any news on a pearl that went to auction last week. This thread came up in google.
    I photograph jewellery and photographed all of the pearls in the latest pearl auction in Dubai. One was this one shown here. To my understanding there are only 3 known nautilus pearls. 2 in private collections and this one. It has a watery looking nacre with tiger stripes that you can only see under a light. Not easy to photograph. This is a pic I did to show friends the size against my finger. The price estimate was in the millions but how many I do not know.
    I expect the other nautilus pearl mentioned here may be made from the shell?? I would like to know more. Rare as they come for sure but how many have been found and discarded or remain in the bottom draw because people don't know what it is?? Imagine!
    Attached Images Attached Images