Heart shaped Serpentine . Rough 200 gr 9 cm long , 8 cm wide and 3 cm thick Serpentine in Latin means the stone of the snake ( seprent ) .It is a very large family of minerals with a yellow-green color and hardness 2,5-5 in Mosh scale The best quality of Serpentine is transparent with a green color of apple ( bowenite ) , or with black inclusions of magnetite or chromite and hardness of 5 -5,5 (williamsite )