The Three Jewels

Triratana

aka Three Gems, Three Treasures, Three Refuges, or Triple Gem

The Three Jewels are:

• Buddha

depending on one's interpretation, can mean the historical Buddha (Shakyamuni) or the Buddha nature—the ideal or highest spiritual potential that exists within all beings;

• Dharma

the teachings of the Buddha; and

• Sangha

The community of those who have attained enlightenment, who may help a practicing Buddhist to do the same. Also used more broadly to refer to the community of practicing Buddhists.

Reference
http://en.wikipedia.org/wiki/Three_Jewels