Generally, all orange and red stones; stones related to the Sun and Mars; Fire and Air-ruled stones, such as carnelian, ruby, garnet, orange calcite, diamond, tiger's eye, topaz, sunstone, bloodstone and tourmaline.
Stones related to specific deities include:
Aesculapius: agate
Apollo: sapphire
Bacchus: amethyst
Cupid: opal
Dionysus: amethyst
Mars: onyx, sardonyx
Neptune: beryl
Odin: holed stone
Poseidon: beryl, pearl, aquamarine
Ra: tiger's eye
Tezcatlipoca: obsidian
~from Maat's Books of Shadows
