Kautilya's Arthashastra 2.11.35

2.11.35

vimalakaḥ sasyako 'ñjanamūlakaḥ pittakaḥ sulabhako lohitākṣo mṛgāśmako jyotīrasako māleyako 'hicchatrakaḥ kūrpaḥ pratikūrpaḥ sugandhikūrpaḥ kṣīravakaḥ śśukticūrṇakaḥ śilāpravālakaḥ pulakaḥ śuklapulaka ity antarajātayaḥ //

Vimalaka (pure), sasyaka (plant-like), Anjanamúlaka (deep-dark), Pittaka (like the bile of a cow) Sulabhaka (easily procurable), Lohitaka (red), Amritámsuka (of white rays), Jyótírasaka (glowing), Maileyaka, Ahichchhatraka, (procured in the country of Ahichchhatra), Kúrpa, Pútikúrpa, and Sugandhikúrpa, Kshírapaka, Suktichúrnaka (like the powder of an oystershell), Silápraválaka (like coral), Pulaka, Súkrapulaka are varieties of inferior gems.