In ancient Egypt Scarab amulets were carded from jasper.  According to legend, jasper was set in the hilt of ‘Balmung’, Siegfried’s sword.

Mentally - Courage, readiness for conflict. Willpower (red) Endurance (yellow) and Protection (Green).  Honesty.

Physically - works with: Circulation and Digestion.  Increases resistance to environmental stress (pollution, toxins, radiation).

Chakra: Varies depending on colour.

Colour - Red, Brown, yellow, green, blue, purple.

Source - Worldwide

Zodiac birthstone - Leo, Aries, Scorpio (varies according to type)