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Alum?

Posted by Jenna Mast

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Jenna Mast

Alum?
March 29, 2012 03:15AM

Registered: 6 years ago
Posts: 959

I came across this add on craigslist for "EXTREMELY RARE Museum Size Fluorescent Minerals & Crystals" but they look awfully similar to alum crystals to me.

[losangeles.craigslist.org]

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Lefteris Rantos

Re: Alum?
March 29, 2012 09:02AM

Registered: 7 years ago
Posts: 791

Ceratinly artificial xls. Some of them may be synthetic "Alum" xls, some may be synthetic Cu sulphate (Chalcanthite) xls, some may be potassium chromate xls (which, by the way, is toxic). But all are lab-grown and artificial.

Lefteris.

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Steve Hardinger

Re: Alum?
March 29, 2012 03:07PM

Registered: 6 years ago
Posts: 1,606

All are definitely lab-grown. That they were once owned by a famous Beverly Hills type is irrelevant.

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