Seashells are largely
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April 13, 2010 at 7:35 pm #11602
Participant
Seashells are largely calcium. This will stick to the glass if a separator is not used. The durability of the shells depends on the thickness, as some of the calcium seems to “disapear” on each firing.
Stephen Richard
blogs at: http://www.verrier-glass.blogspot.com/ and http://www.glasstips.blogspot.com/