Pentacle

One of the reasons why it is so hard to find new info about hexagrams is that it has so many synonyms:
Star of David
Magen David
Mogen Dovid
Seal of Solomon
Six-pointed Star
Shield of David
David's Star
Judenstern
Yellow Patch
Hex-alpha
...and now I stumbled upon another name, Pentacle, that is used for pentagrams as well.

Hexagram on a pentacle taken from Israel Regardie’s book The Golden Dawn.
Photo is copied from Wikipedia.