Anandakanda 2.2.5

2.2.5

rasendravedhasaṃjātaṃ svarṇaṃ pañcavidhaṃ smṛtam /
brahmāṇḍaṃ saṃvṛtaṃ yena rajoguṇabhuvā khalu //

and born of transmutation by the lord of mercury: gold is declared to be of five kinds.
That which surrounds the cosmic egg, born indeed from the quality of rajas—