Joined: Fri Feb 24, 2006 1:20 am Posts: 2756 Location: Southern California, U.S.A.
Try punching the "Geminterest" button ion the left-hand side of this page. It's in French but can easily be used by non-Francophones and has excellent spectrum information plus much more.
Thank you Facetnator and ROM. However, don't you find that those sources are quite incomplete, and that both take an awful lot of time to utilize? Since spectoscopes are supposed to be such useful gem identification test instruments, it's very strange that not even the instrument manufacturers seem to have come up with any associated charts. Probably,everybody who owns a spectroscope would be a ready customer, don't you think? Wish I had the know-how to put it all together. Seems like it might be a profitable venture!
Thanks to all who responded to my query. I was pleasantly surprised, in particular, to learn about the OPL book available from GIA (on special at $16.20 this month, incidentally), and have hastened to order one. I bought an OPL student version spectroscope some months ago from a different US source. Curiously, that source made no mention of any such OPL book.
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