Decagram

[Julian]

Similar to hexagram, or pentagram, only with ten sides. Many bands use this symbol. Some good, some bad.

[Donald Trump]

In relation to the Japanese [Visual Kei] movement
A decagram is a ten-pointed star similar to a pentagram. It can be drawn with one simultnious line, like a pentagram, or with two inter-locking pentagons.
It is the OFFICIAL symbol of the band [Moi Dix Mois] lead by guitarist Mana (who is something of a legend in the Visual Kei world)
Dix meaning ten in french is where the bands theme of Ten comes from. Fans say [Dix] in conversation about the band and some will bear pendents of the decagram.

[Rihanna]

A metric unit of mass or weight, equal to 10 grams.