षडश्रश्चतुरश्रो वृत्तो वा तीव्ररागः संस्थानवानछः स्निग्धो गुरुरर्चिष्मानन्तर्गतप्रभः प्रभानुलेपी चेति मणिगुणाः ॥ कZ_०२.११.३३ ॥
ṣaḍaśraścaturaśro vṛtto vā tīvrarāgaḥ saṃsthānavānachaḥ snigdho gururarciṣmānantargataprabhaḥ prabhānulepī ceti maṇiguṇāḥ
Ang mga katangian ng hiyas ay: may anim na sulok, apat na sulok, o bilog; matingkad ang kulay; maayos ang anyo; malinaw; makintab; mabigat; maningning; may ningning sa loob; at nagpapalaganap ng ningning palabas.
They operate like a checklist for inspectors—standardizing acceptance/rejection, pricing bands, and accountability in treasury acquisitions.
Weight/density helps distinguish genuine stones from lighter substitutes, supporting fraud detection and consistent valuation.