Sericite is a fine, untreated plain mica powder that will increase the translucency of your products. This powder reflects light but tends to be low in lustre. Sericite offers a silky, matte finish that improves adhesion, reduces the appearance of fine lines and wrinkles and will not clog pores. 
Great base and bulking powder.  
Ingredients:  Mica (77019) 
Cosmetic grade.  Off-White (grayish) US and EU approved for eyes, lips, and face.