Rasendrapurana 26.7

Rasendrapurāṇa 26.7

tatrādau ṭaṃkaṇabhedāḥ
ṭaṃkaṇastrividhaḥ proktaḥ sphāṭikābho guḍaprabhaḥ
tṛtīyaḥ pāṃḍuraḥ proktaḥ śṛṇu tasya guṇāguṇam