Hajrul Yahood Bhasma is an Ayurvedic medicine in powder form.
Its uses:
It  is useful in treating urinary calculi, difficulty in urination and other urinary tract disorders. It is also used for external application in ring worm infection in children.
Effect on Tridosha – Balances Pitta and Kapha.
Dosage:
250 mg – 500 mg, once or twice daily, before or after food, or as directed by Ayurvedic doctor.
Hajrul Yahood Bhasma Ingredients:
Its chemical name is Calcium silicate or Lime Silicate.. Its powder is triturated with radddish juice, made into discoid cackes, dried and subjected to 500 – 600 degree celsius for 4 – 5 hours. Thus the Calx of this is prepared, and stored in dry containers.
Reference: Siddha Yoga Sangraha.