日文：シリカ、無水ケイ酸、二酸化ケイ素，參見：http://www.ba-m-bi.com/seibun/gaiyo/silica.htm

Silica會致痘嗎？為何我用了bareminerals blemish remedy foundation 全面長石頭大痘，裏面含silica,有人跟我一樣嗎？

WHAT-IT-DOES: viscosity controlling, absorbent/mattifier
Details
A white powdery thing that's the major component of glass and sand. In cosmetics, it’s often in products that are supposed to keep your skin matte as it has great oil-absorbing abilities. It’s also used as a helper ingredient to thicken up products or suspend insoluble particles.