The name of this gemstone comes from the Spanish pieda de ijada, "hip stone"; it was thought to cure kidney diseases
In 1863, the gemstone, which 
had been known for 7,000 years, was proved to consist of two separate, distinct... [DOC] [TLE] Jade: Successful Love | Crystals: In-Depth - CrystalWind.ca [PAR] Jade is a name applied to gem quality forms of two minerals; Jadeite and 
Nephrite.