Rasendracudamani 13.36

13.36

tāmrasyārdhaṃ ca rajataṃ jātarūpaṃ tadardhakam /
vajrabhasma tadardhaṃ ca sarvatulyaṃ mṛtābhrakam //

half that of copper of silver, half of that of gold,
half of that of diamond ash, and calcined mica equal to the whole;