Vibhaga 1, Adhyaya 74 — ब्रह्मप्रोक्तलिङ्गार्चनविधिः
Materials, Classes, and Fruits of Linga-Worship
शैलजं प्रथमं प्रोक्तं तद्धि साक्षाच्चतुर्विधम् द्वितीयं रत्नजं तच्च सप्तधा मुनिसत्तमाः
śailajaṃ prathamaṃ proktaṃ taddhi sākṣāccaturvidham dvitīyaṃ ratnajaṃ tacca saptadhā munisattamāḥ
First, the mountain-born (stone) Liṅga is declared; indeed it is directly of four kinds. Second is the gem-born Liṅga, and that, O best of sages, is of seven kinds.
Suta Goswami (narrating to the sages of Naimisharanya)
It establishes an authoritative taxonomy of worship-worthy Liṅgas—stone and gem—so devotees can choose proper materials and forms for Liṅga-pratiṣṭhā and daily pūjā.
By allowing multiple material embodiments (stone/gem with defined subtypes), the verse implies Shiva as Pati (the Lord) is not limited by matter; the Liṅga is a sanctioned support for realizing the formless Śiva-tattva through form.
Liṅga-upāsanā is foregrounded—selecting a proper Liṅga for installation and worship—serving as a concrete aid for Pāśupata-oriented sādhana that purifies the paśu (soul) and loosens pāśa (bondage) through disciplined pūjā.