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What kind of rod is it?






I was told the rod I bought from another member was ND:YAG, but the man it was purchased from earlier said it was glass, I didn't think so. Thanks guys.
 
Yeah, I somehow lost sight of the original questions when I went off on a tangent about Nd:GLASS rods. My mistake. Should have stuck to the original question. :o
 
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Take a pair of calipers, measure carefully the rod length and diameter in centimeters. Weigh it on an accurate gram scale. Weight divided by volume = density.

YAG has a density of ~4.6
Phosphate type 750 laser glass has a density of about 2.4 , others have a density around 2.9 or so..

Schott's Numbers near the bottom of this link. Hoya Glass will be similar

Clearly different.

https://www.youtube.com/watch?v=gbNCBVzPYak (finally got the right video)

Steve
 
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When I was a rock hound we called it specific gravity, but it is basically the same thing. What units are you using for density? gm/cm^3?
 
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