Is there a absorption spectrum chart for the most common gems to get somewhere?
Yes I just purchased this book used for 27.00 USD. It has all the gem ID information including a picture or the absorption spectrum.
Gem Reference Guide for the Gia colored stones, gem identification and colored stone grading course.
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Thx I will look and see if I can find it
After lots of reading I found this web page.
On the left column there is loads
Do you have a link where this can be found for the price you paid? Amazon is crazy.
I got it used on eBay for 25 USD. sorry it took so long to get back to you.
Hi this site has all the common spectrums and more try this website it is great