General:
* Sparkling
* Shimmering
* Gleaming
* Shining
* Radiant
* Dazzling
* Brilliant
* Luminous
* Resplendent
* Scintillating
Figurative:
* Glamorous
* Magnificent
* Impressive
* Striking
* Notable
* Outstanding
* Celebrated
* Renowned
More specific:
* For jewels: Gemmed, jeweled
* For water: Rippling, rippling, reflecting
* For metal: Polished, burnished
* For snow: Icy, crystalline
* For a performance: Spectacle, dazzling
The best synonym will depend on the specific situation and the nuance you want to convey.