Physical state: This produce is made of natural silica sand by the advanced processes of water scrubbing and reelecetion.Natural silica sand has the naturally founded grain shape and uniform particle size and takes on brown-white or off-white color.

• 物理状态：本产品经天然硅砂水洗，重选等工艺加工而成，天然硅砂具有天然的滚圆粒形和均匀的粒度，呈褐白色或灰白色。