Joined: Mon Aug 20, 2012 11:32 pm Posts: 1747 Location: Florida, United States
So, this stuff is evidently a high refractive index and specific gravity glass? Any composition information available? I could not find anything online.
According to Kurt Nassau in GEMS MADE BY MAN (page 216), Jewelite (not to be confused with Jewel-Lite) is one of several trade names that Strontium Titanate used to be sold under.
R.I. = 2.41 Dispersion = 0.19 MOHS hardness = 5.5
The couple of pieces of rough labeled "Jewelite" that I have came out of an old collection I purchased some years back and tends to be more colorless than the more modern examples of Strontium Titanate I've seen. No yellowish or brownish tint at all.
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