Citrine

Appearance:

Transparent; yellow to golden-brown

Esoteric beliefs and associations...

Associated with the direction of East. Even in pale shades of yellow, it strengthens intellect, study and psychic skills (including divination). Golden/brown Citrine is associated with the zodiac sign of Gemini, Yellow Citrine with Virgo, and Orange Citrine with Libra.

Physical properties...

Chemistry	Silicon dioxide
System/Structure	Hexagonal (prisms with pyramids)
Refractive Index	1.544 - 1553
Specific Gravity	2.65
Mohs' Hardness	7