ratnatraya. alt. -triratna- (P. ratanattay a/tiratana; T. dkon mchog gsum; C. sanbao; J. sanbō; K. sambo 三寶).
In Sanskrit, the “three jewels,” also translated into English as the “triple gem” or the “three treasures”; the term is also often given as triratna.
see also: Three Jewels
The Princeton Dictionary of Buddhism by Robert E. Buswell Jr. and Donald S. Lopez Jr.