lumps of alum on a black background. it is a mineral with clear, white crystals, odorless, astringent taste, ground into a white

alum potash potassium shaving aluminum aluminium material beauty spa industrial plant crystalline hygiene products cosmetic antiseptic healthcare clean water concept chemistry medical isolated alternative medicine crystals armpit deodorant healthy nature herbal organic rock background natural white stone health camphor therapy texture homemade ingredient crystal treatment crystallized scrub toothpaste closeup mineral chemical lumps black clear odorless astringent taste ground powder resembles sugar