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 Post subject: Re: Specific gravity vs. RI graph?
PostPosted: Wed Nov 21, 2012 10:14 am 
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If you add some rarities to the graph, the dispersion will be even greater, try for example with sulfur, baryte, sphalerite...

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 Post subject: Re: Specific gravity vs. RI graph?
PostPosted: Wed Nov 21, 2012 12:19 pm 
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gemlover wrote:
also no polynomial, tried that too.

john

There's *always* a polynomial, max order is the number of points :-)

Reminds me of a trick quiz question in a "Calculus of Finite Differences" course.


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