Shop round for French chalk

Clear glass shop round, with glass stopper and powdered contents with words 'Pulv. Cret Gal':' in black lettering on a gold three pointed shield, for French chalk

Pharmacy bottles have their contents named on the outside in abbreviated Latin.'Pulv Cret Gal:' translates to pulvis crete Gallicae or powdered French chalk. Also known as hydrous magnesium silicate, French chalk was used for coating tablets or to help mix ingredients.