Rasamanjari 3.36

3.36

śoṣayitvā dhamet sattvaṃ indragopasamaṃ bhavet /
<abhraka>
pinākaṃ darduraṃ nāgaṃ vajramabhraṃ caturvidham /
dhmātaṃ vahṇau dalacayaṃ pinākaṃ visṛjatyalam //

Having dried it, one should blast it; its essence will become like a cochineal insect. / <Mica>
Pināka, dardura, nāga, and vajra: mica is of four kinds. / Blown in fire, pināka completely sheds a multitude of layers.