A 3,563-carat Purple Star Sapphire, dubbed the Star of Pure Land and the largest of its kind, has been unveiled in Colombo, ...
Ultraviolet-B (UV-B) semiconductor lasers are highly sought for medical, biotechnology, and precision manufacturing applications; however, previous UV-B laser diodes were limited to pulsed operation ...
A Purple Star Sapphire weighing 3,563 carats which is claimed to be the world’s biggest of its kind was unveiled on Saturday ...
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