They have crase marks from the heat.
-----Original Message-----
From: Jiongtao HUANG <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Thursday, November 25, 1999 7:32 AM
Subject: Baking cowries
>Hi, everyone.
>
>Recently, some "Great Golden Cowries" come to the shell market in Japan.
>But in Dr.Lorenz's cowrie book, some black cowries such as Cypraea onyx
etc.
>can become "golden color form" by baking. But Dr.Lorenz did not explain how
>can we separate a "golden shell" or "color variation" is a baking one or
>natural one.
>Could anyone of you tell me how can we separate a baking shell from natural
>one? or testing method?
>Thank you very much advance.
>
>Jiongtao
>http://www.soft.ics.keio.ac.jp/~huang/
>
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