Spinel is the gem of 22nd and 65th wedding anniversaries and has a hardness of 8 on the Mohs scale. Spinel is available in nearly every colour but most commonly is found in red, orange, violet, pink, purple and red.

Many famous rubies in crown jewels are in fact spinel as the two were confused with one another across history. Utopian Creation's spinels are sourced typically from northern New South Wales and Tasmania.