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How do you make abalone blank?



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Try this site, an excerpt and the site:

The abalone is a gem shell, multifaceted in color, with opal and pearl essence. It has a hardness value of 4, which is durable and not difficult to work with in regards to breakage. One must be prepared to be very careful when trying to alter its shape or drill it. Lapidary equipment is necessary when grinding and must be water fed so dust from the shell is washed into a holding basin and not into the atmosphere. Breathing the dust will cause lung damage. * http://www.abalonekids.com/id39.html