Garuda Mahā Purana - Achara Khaṇḍa
74 - On the test of Gems - Topaz
Sūta said:
1. From the particles of the skin of demon Bala that fell on the top of the Himalaya mountain Pushparága (Topaz) gems of great virtue have come up.
2. A gem of this variety, yellowish grey in colour, is called Padmaraga (Ruby). If it is crimson-yellow it is called Kaurundaka.
3. A transparent variety slightly red and yellow is called Kaşhayaka; slightly blue and white in colour, glossy and commendable is called Sománaka.
4. That which is of deep red colour is indeed Padmaraga (Ruby); if it is of deep blue colour, it is called Indranila (Sapphire).
5. The price of this gem is fixed like that of Vaidurya (Lapis Lazuli) by experts in Gems. The result is also similar but it blesses women with sons.
Summary of chapter 74 of the Garuda Mahā Purana - Achara Khaṇḍa is as follows:
The Supreme Being glorifies Mathurā, the sacred birthplace of Bhagavān Kṛshṇa, as a holy land saturated with divine love and pastimes. Visiting Mathurā and Vrindāvana awakens pure Prema-Bhakti in the heart and grants eternal residence in Goloka.