Spinel ( ) is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula MgAl
2
O
4
in the cubic crystal system. Its name comes from the Latin word spinella, which means spine in reference to its pointed crystals.

https://en.wikipedia.org/wiki/Spinel

Spinel Steven Universe

This is Steven universe's spinel, The one with the upside down heart. But she is happy, not looking ...

"For all our failings, despite our limitations and fallibilities, we humans are capable of greatness."
Carl Sagan
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