French chalk (powdered) is often used as an abrasive to polish something else, usually metal or another stone. It is very very fine and puts a soft glow on the object or material you are polishing. You mix it with a tiny bit of oil or water to polish the object and use a soft cloth like an old fabric baby diaper or cotton t-shirt.
Technical features
Polishing technological (Vienna) lime, - a white powder, apply to polishing of products from non-ferrous metals, gold, silver, from it prepare universal polishing pastes.
