> the opinion that for less calcified species or specimens- like the
> land
> snails, fw shells and microshells he likes to collect cotton is a big
> no-no.
> I think he has told me he has seen damage to some older specimens of
> those
> kinds. Again, if I recall he thinks it may be less of a problem for
> the
> stronger marine species...but again, who really knows.
Calcium carbonate is calcium carbonate. A thick shell will show acid
damage in exactly the same way as a thin one of similar dimensions.
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