Specification: 100% Brand New & High QualityMaterial: Natural StoneSize:3-5cm(1.18×1.97inch) Weight: 200G Description:1.These beautiful glowing rocks are typically found along lake shores.2.Beautiful and shocking magma can be seen under ultraviolet light.3.The rocks can be put on display or used by artisans to create jewelry such as a bracelet, necklace or beads.4.Each product is pure natural,irregular,unique, not exactly the same.5.Crystal rough brings you the charm of rough. *Important note: 1.Please in the ultraviolet light irradiation can be seen under the beautiful and shocking lava slurry. 2.Ultraviolet (UVA. UVB.UVC) radiation, display effect is different.