Natural Gemstone,Quantity: 1LB,about 3 to 4pcs included depend on size of units Heart size:approx 60x56x27mm to 77x63x42mm(2.4 x 2.2 x 1.1 inches to 3.0 x 2.5 x 1.6 inches) Please note the rainbow flash will only be shown under light, better strong light like sunlight, otherwise it's just dark and black Uses: paperweight, massager stone, crystal healing, Reiki, energy balance, pocket stone, desk decor, Room decoration, gift, etc. Each and every specimen is unique and you will receive ones similar to the image shown.