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 ...

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

The gemstone spinel, known for its vibrant colors resembling gems like rubies and sapphires, has now been shown to be capable ...