Tiger Eye (or Tiger's Eye) is technically a quartz variety since it contains silicon dioxide and has a hardness of 7. Golden Tiger Eye is formed from hawk’s eye thru pseudomorphism of Crocidolite in Quartz, causing optical reflections w/bands of yellow-brown to golden. Hawk's Eye is the blue colored version of Tiger Eye that has not gone through that replacement. There is also red tiger eye that has inclusions of oxidized iron in it.
Gold: Enhances vitality, strength, and sense of self; increases luck and prosperity
Red: Enhances willpower and confidence, grounding; helps with sexual problems
Blue: Can be used for evil eye protection; helps diminish self criticism; soothing