Kansya is an important Misra Loha, an alloy of Copper and Tin known since the period of Samhita Kala. Charaka used this metal to prepare Vasti netra. It is known as Bell Metal or Bronze. Bell metal is a hard alloy used for making bells and related instruments, such as cymbals. It is a form of bronze, usually in approximately a 4:1 ratio of copper to tin (e.g.78% copper, 22% tin by mass). KansyaBhasma (also spelled as Kansa Bhasma) is a metal-based Ayurvedic medicines. It is prepared from the bell metal ore, which is likely to contain about 78% copper and 22% tin. KansyaBhasma is used in the treatment of intestinal worms, skin diseases with dry and hard skin and eye problems. It may not work alone, so adjuvants are required to get benefits from it. According to the description given in Ayurveda texts there are two varieties of Kansya viz. Pushpa and Tailika, only the former being acceptable for therapeutic applications.