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Laser Alexandrite: An amazing material grown mostly for medical lasers
This means that it shows a mixture of red and green flashes
It likely didn't quite make it through QC before final shaping
no durability issues and good optical properties which make it sparkle brilliantly
Fortunately for us these uses require very exacting standards and sometimes crystals are rejected
BGO12 Bismuth Germanate Facet Rough Marked Letter:1pc 6-7g Laser Alexandrite: An amazing materialThese are BGO 12 aka Bismuth Germanate facet rough. This is a real cool rarity in the gem world. Bismuth Germanate (in this case, specifically Bi3Ge4O12 aka evlitine) is valued as an optical substrate because of its highly unusual electrooptical properties. It has exceptionally good optical properties too, with (as far as we can tell the literature is weak) an RI of 2. 15 and dispersion of 0. 1. Cut stones are incredibly beautiful with high brilliance
US$ 374.50
US$ 79.00
US$ 11.59
US$ 11.90
