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Posted in response to Re: Re: Re: Re: Natrolite from Ward on January 19, 2012 at 02:11:42:

Re: Re: Re: Re: Re: Natrolite

Ward,

The color will not tell you which species you have as mesolite, thomsonite, and natrolite are normally colorless to white. Any color comes from impurities. Rudy has analyzed numerous natrolite, scolecite, and mesolite crystals and these three are often zoned in a single crystal. They cannot be identified by morphology, one needs to use optics to id them. Rudy has diagrams in the book of zoned crystal. Thomsonite, when it has a bladed habit, can be distinguished from the others by morphology. Here in the northwest we know what is present at many of the localities because of the work Rudy has done.

Doug

From Doug Merson - January 22, 2012 at 02:45:59
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