公主在典礼上戴着一顶镶有红宝石和绿宝石的闪亮头冠。

The princess wore a sparkling ___diadem studded with rubies and emeralds at the ceremony.

山顶的积雪在阳光下闪耀，像一顶天然的王冠。

The snow on the mountain peaks shone like a natural ___diadem in the sunlight.