Gem Spectrum resources

[VargaStyle]

Can anyone recommend a good reference book for spectrum or an online source. I finally worked out my lighting issues but now it would be great to have a library of spectrums.

[Barbra Voltaire, FGG]

Can I presume you are using a handheld spectroscope like an OPL?
https://www.geminterest.com/spectlist.php

Let us know if this works for you.

[marcm]

and here : http://www.gemlab.co.uk/index.html

[VargaStyle]

Thank you! This helps.

[Alan F.]

I like "Gemmology and the Spectroscope" by Basil Anderson. Well written, comprehensively illustrated and recently updated. Not cheap, but worth the money.