Aluminum oxide also makes transparent gemstones like rubies. However, there is some — kind of — transparent aluminum at the end of the video.

Aluminum oxide also makes transparent gemstones like rubies. However, there is some — kind of — transparent aluminum at the end of the video. The thin aluminum film on a plastic substrate ...

A new study reveals that spinel, a vibrant and rare gem, can also be used as a qubit system. Spinels are a transparent gems ...

The world's rarest gemstone is made of kyawthuite, a transparent reddish-orange mineral that’s known from just one sample ...