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...

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