... silica mine&factory Professional manufacturer for 30 years 1. Product InformationName: Silica pebblesOther names: Flint ... , Silica grinding ballsProperty: Round grayish silica stoneSize: 2-4cm, 4-6cm, 6-8cm, 8-10cm, 10-12cm ... located in Dalian, China. The mining limitation period is over 30 years.2. Quality guarantee--our ... us grinding silica man-made pebbles (round,1-2cm,2-4cm,4-6cm,6-8cm,8-10cm,10-12cm ...