Alum stone

Also found in: Encyclopedia.
Related to Alum stone: potassium alum

Al´um stone`

1.(Min.) A subsulphate of alumina and potash; alunite.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Charme d'Orient has expanded its Ecocert-certified organic range with Baume d'alun, formulated with purifying alum stone, known for its toning and firming properties, as well as beeswax, argan oil and nourishing and protective shea butter, delicately scented with orange flower and almond.
For instance, some clients who have very sensitive skin prefer to have the Berber Cereal Exfoliating treatment or Alum Stone scrub to the traditional black soap peeling.