... 2.decoration for pool, pave,aquarium, 3.size: 1-2mm, 2-3mm, 3-6mm, 6-9mm 4.never ... Specification: ProgramTypical ValuesColorRed,Pink,Yellow,Blue,Green,Amber,Purple,Black, Transparent (color can be ajusted as required)ShapeRound ... be bigger than 5mm) Refractive Index1.30- 1.50Specific Density(g/cm3) 2.50Volume Density(g/ ... cm3)1.50Micro Hardness(kg/mm2)>635Mohs Hardness>6 ...