Ratnasambhava is the yellow Buddha of the southern quarter. His name means "jewel born". His emblem is the Ratna jewel, symbolizing the Bodhicitta, the highest value of the Buddhist. The mantra is om Ratnasambhava tram.. Who is Ratnasambhava? Ratnasambhava is one of Mahayana and Vajrayana or Tantric Buddhism's Five Dhyani Buddhas (or "Five Meditation Buddhas"). Ratnasambhava Mantra The mantra of Ratnasambhava is om Ratnasambhava tram. Siddham Mantra of Ratnasambhava Siddham Mantra of Ratnasambhava Tibetan Uchen Mantra of Ratnasambhava Tibetan Uchen Mantra .