Shudh Swarn-Makshik and Naag Bhasma taken in equal proportions are blened in Ark leaf juice to form a paste. The paste is applied to Shudh (purified) Swarn pieces which are then transferred in an earthen vessel. The earthen vessel is sealed and given a Gajput (refer glossary) to obtain Swarn Bhasma
Swarn Bhasma (Method 3) - Ingredient Details
Aushadhigundharm shastra lists the real author/treatise of the described method for preparing Swarn Bhasma.