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Magnesium Aluminum Silicate

Magnesium aluminum silicate is a purified smectite clay. In water it swells into a smooth gel.

On a list as
Magnesium Aluminum Silicate
What it does
Clay thickener
Where it comes from
Mineral: a purified clay
Vegan?
Yes

Why it’s in a formula

It thickens, keeps pigments and particles evenly suspended so they don't settle, and gives mascaras, liners and masks their body.

Read from each piece’s published ingredient list. 3 pieces.

Le Masque d'Argile

Le Masque d'Argile

Purifying Clay Mask — 118ml

$64

Listed as Magnesium Aluminum Silicate

Vegan, going by its list

Le Mascara

Le Mascara

Volumizing Mascara

$46

Listed as Magnesium Aluminum Silicate

Not vegan: beeswax

L'Encre

L'Encre

Liquid Eyeliner

$32

Listed as Magnesium Aluminum Silicate

Vegan, going by its list

Is magnesium aluminum silicate safe?

Yes. It is an inert clay, and it isn't the same thing as the aluminium salts in antiperspirants.

How we know: every ingredient list on this site is the manufacturer’s own, read piece by piece and shade by shade, and the pieces above are worked out from those lists each time the site is built. Ingredient names and functions follow the EU’s CosIng database. This page describes cosmetic ingredients; it isn’t medical advice.