Scriptural Reference:
Mayamatam, Adhyāya 12: “Vāyavyaṁ śvetavarṇaṁ vāyu tattvaṁ prakalpayet” — The North-West is governed by the Air element and the white hue.
Vishwakarma Prakāśa, Ch. 6: Mentions crystalline implements for vāyu-śamana (balancing Air disturbances).