Spinel, MgAl 2 O 4 (download cif), is a rare gemstone that was used to imitate rubies. The structure has face-centered cubic symmetry, and is a little heavy to understand. The general formula is AB 2 ...

A new study reveals that spinel, a vibrant and rare gem ... When specific atomic defects are introduced in a gemstone, they ...

T he gemstone spinel, known for its vibrant colors resembling gems such as rubies and sapphires, has now been shown to be ...