Anandakanda 1.24.26

1.24.26

<aṣṭamaḥ prakāraḥ pītavarṇavaikrāntasiddhaḥ>
pītavarṇe'pi vaikrānte raktakṛṣṇavidhiḥ smṛtaḥ /
pītavaikrāntacūrṇaṃ tu hemacūrṇasamanvitam //

<Eighth method: accomplished with yellow tourmaline>
Even for yellow tourmaline, the rule of the red and black is remembered.
Powder of yellow tourmaline along with gold powder,