Many pagans and in particular those who follow the Wiccan path, use the pentagram as a symbol of faith in a similar way to symbolls used by other faiths (the Christian cross, Jewish Star of David etc). It's not, a universal symbol but it is very popular.
The five points represent the elemental spirits of Earth, Air Fire and Water. The fifth point represents the self/soul/spirit.
When encircled the symbol becomes known as the Pentacle in Wicca. The circle represents the binding of the elemental forces and the spirit in a harmoneous relationship. The pentagram is normally displayed with one point uppermost, partly because of the "inverted" goat's head pentagram tends to get associated with Satanism; Nevertheless, even in Wicca the pentagram can be used inverted (two points up) and it is used this way as a symbol of Second Degree Initiation - But, in this context it has absolutely no relationship with Satanism.
We sell a great range of pentagram and pentacle jewellery (See below). If you search in the Jewellery section you will find other examples used on bracelets, earrrings and rings.