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 Post subject: Re: glass or crystal?
PostPosted: Sun Oct 04, 2015 3:25 pm 
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The specific gravity of this glass is approx 6.6.
Which, according to Roger Dedeyne would bring the RI over the limit to approx 1.9.


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 Post subject: Re: glass or crystal?
PostPosted: Sun Oct 04, 2015 11:13 pm 
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Barbra Voltaire wrote:
The specific gravity of this glass is approx 6.6.
Which, according to Roger Dedeyne would bring the RI over the limit to approx 1.9.

Did anyone consider determination of the Luster reading?


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