... )ShapeRound ball or Oval speciesSize0.4-6mm (0.4-0.6, 0.6-0.8, 0.8-1.0,1.0-1 ... .5,2.5-3.0,3-4,4-5,5-6)Refractionindex 1.30-1.50SpecificGravity(g/cm3)2.50Contain gravity ... enlace.III.Storage: Dry and shelteredSizes :0.6-1.2mm.1-3mm.3-6mm.6-9mm .also other sizes for custom's ...