A hexagram is a six-pointed star. It is usually symmetrical, formed by two overlapping equilateral triangles.
Some cultures say that the triangle pointing downwards represents female sexuality and the triangle pointing upwards represents male sexuality. The combination represents unity and harmony. In alchemy, the two triangles represent the reconciliation of the opposites of "fire" and "water". The hexagram, like the pentagram, was and is used in practices of the occult as well as Satanism.
A hexagram is any of the sixty-four sets of solid and broken lines used in the Chinese classic text I Ching. Each of these consists of two trigrams, and may be referred to either by its own name and number or as one trigram over another.
The hexagram was a large silver coin of the Byzantine Empire issued primarily during 7th century AD during the reigns of Heraclius, Constans II, and Constantine IV. It weighed about 6 grams. It was not as common as bronze or gold coinage.
See also: Byzantine currency.