People have done advanced design work about this sort of thing for artificial red blood cells that could hold 100 times as much oxygen if they were using tiny sapphire vessels to store the oxygen.
The rugged yet lightweight titanium case extends to protect the flat sapphire crystal and can endure temperatures that fall below zero or climb 130 degrees above it.
Another novel certificate of admission is from Harbin Institute of Technology in Heilongjiang province, which is rimmed with diamonds or sapphires, expressing the hope that the freshmen will embrace shining achievements in the future.
The fear now is that, since the pieces are too recognisable to be sold intact, the robbers will break out the diamonds and sapphires to flog them separately.