By Kurtis Schaeffer (University of Virginia, 2009)
The Jewel Heap collection (དཀོན་མཆོག་བརྩེགས་པ་, dkon mchog brtsegs pa, ratnakūṭa) is comprised of forty-nine titles in six volumes (1757 folios). This roughly fifth-century CE collection of individual sūtras is far more diverse in content than the Sūtra of the (Buddhas') Vastness (also known as the Flower Ornament, ཕལ་པོ་ཆེ་, phal po che, avataṃsaka, D.45), covering a range of philosophical and ethical themes such as monastic precepts, wisdom, the illusory nature of reality, skillful means, the nature of the mind, luminosity and enlightened activity, the Pure Land, and perhaps above all, emptiness.
Literature: Garma C. C. Chang, ed., A Treasury of Mahāyāna Sūtras: Selections from the Mahāratnakūta Sūtra (University Park, PA: The Pennsylvania State University Press, 1983), contains translations from the Chinese of twenty-two of the forty-nine sections of the Jewel Heap.