03-04-2007, 08:32 PM
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 | Museum Pearl Senior Pearl-Guide.com Pearl Expert | | Join Date: Dec 2004 Location: Southern Arizona
Posts: 3,247
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http://www1.uni-hamburg.de/mpi/museu...perlen_en.html Quote:
The Mineralogical Museum of the University of Hamburg is offering an identification service for pearls using different X-ray methods: X-ray tests can show whether - a pearl is natural or cultured
- a cultured pearl is bead- or tissue-nucleated
- a pearl is from marine or freshwater sources.
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Interesting pictures in this link
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Caitlin  potamilus purpuratus American Pearl Mussel Where can I get a pearl from this mussel? |