Sphatika Bhasma is an Ayurvedic medicine in powder form, used in the treatment of leucoderma, herpes etc.
Uses:
It  is useful in abdominal pain, Pneumonia, low back ache, Dry cough, Chronic bronchial diseases, haematemesis, menorrhagia, leucoderma,Visarpa, etc.
It is also called by the names – Tuvari, kankshi, Phataki etc.
Effect on Tridosha – Balances Vata and Pitta.
Dosage:
125 – 250 mg, once or twice daily, before or after food, or as directed by Ayurvedic doctor.
Sphatika Bhasma Ingredients:
There is no purification procedure explained for Sphatika (alum). Each molecule contains 24 water molecules, which is evaporated by the process heating.
Sphatika – Alum, is heated in open air, in a pan till all the moisture is lost. At the end, white powder is collected.
Reference: Ayurveda Prakasha.