Significance of Seven metals
The keyphrase "Seven metals" pertains to two main contexts within Shaktism and Rasashastra. In Shaktism, it refers to a set of seven metals used in sacred activities, particularly for crafting ritual items. Meanwhile, in Rasashastra, the term signifies a specific group of metals, which includes gold, silver, copper, iron, zinc, tin, and lead. This category of metals must be reduced to ashes prior to use in medicinal preparations, highlighting their importance in both spiritual and practical applications.
The below excerpts are indicatory and do represent direct quotations or translations. It is your responsibility to fact check each reference.
Hindu concept of 'Seven metals'
In Hinduism, the Seven metals encompass gold, silver, copper, iron, zinc, tin, and lead, which are vital for sacred rituals and medicinal practices, highlighting their spiritual and practical significance in various ceremonies.
From: Rasa Jala Nidhi, vol 3: Metals, Gems and other substances
(1) The group of metals that includes gold, silver, copper, iron, zinc, tin, and lead.[1]
From: Rasa Jala Nidhi, vol 4: Iatrochemistry
(1) A category of metals that should also be reduced to ashes before they are used in medicines.[2]