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Hi Patricia, the abalone blister pearls are produced by worms and parasites in the inner side of the abalone shell. The outside nodules can be polished to look like a blister pearl but they wouldn?t be consider as a blister pearl.

For all I know, that would be as dificult to achieve as a good "world?s CO2 control agreement".

You?re welcome, I?m always informing myself in this forum so a small retribution is neccesary.

In case you haven?t seen it. http://www.economist.com/business-finance/displaystory.cfm?story_id=15664058

Thank you smetzler, I misunderstood the meaning of mantle in cephalods, I researched a bit and now I got it.

I have the same question as Valeria, How can it be that a tissue different from the mantle or bone secret a calcium concretion? Does this kind of cephalopod has claws in their tentacles?

Thank you Caitlin. That?s the way we use in Chile for "laugh", a less demure laugh, jajaja (and again).

Hi Ramona, I think the damage will be suffered by the shell rather than the pearl wich is protected by gonad tissue. Probably before the water?s pH of the whole ocean changes much worse effects will come from FANS and other uncontrollable microorganisms due to water temperature rise. (My...