The following moderators provide local knowledge and expertise for Jewel beetles (Buprestidae):
entom2 | MarkH | AlisonMilton
References for Jewel Beetles (family Buprestidae): https://sites.google.com/site/buprestidpages/
And a photo gallery for the family: https://sites.google.com/site/buprestidpages/buprestidae-gallery
This gallery can be searched by genus, for example, Castiarina:
https://sites.google.com/site/buprestidpages/castiarina-gallery
Another good gallery for Castiarina: http://www.virtual-beetle.com/castiarinafp.html