Calcium Aluminum Borosilicate

Calcium aluminum borosilicate is another engineered borosilicate glass, milled into fine flakes or microspheres and used the same way as its calcium sodium counterpart: as a sparkle and light-diffusing effect pigment in eyeshadow, highlighter, lip products, and nail polish. CIR reviewed it alongside the other borosilicate glasses and concluded it's safe as used, provided the glass meets standard impurity and particle-size specifications.

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.