nickpix2012:
Bismuth
kense.20xx:
Escadean / Sherborne 1847
aaronvandorn:
Buttons 2
Mauro Cateb:
Blue topaz
Tim Evanson:
Topaz with irradiated fragment - Smithsonian Museum of Natural History - 2012-05-17
the justified sinner:
Blue Topaz
Mauro Cateb:
Treated Brazilian blue topazes