Quote:
Originally Posted by smetzler 
I was on the verge of proclaiming the non-violability of nacre/aragonite's iridescent qualities, but then remembered [...]
I have no idea where I'm going (or where I went) with this. Consider it recreative diversion…
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There was a thread about 'iridescence' with a horde of other gems showing iridencence of some kind... somewhere 'round here. No shortage! Pearl keep the property pleasantly mysterious and hold the lead, I'd say
(this is a pearl forum after all!)
