她收到了一条美丽的钻石项链作为礼物。

She received a beautiful ___diamond necklace as a gift.

他曾在南非的钻石矿工作。

He had worked in the ___diamond mines of South Africa.

她发现自己手指上戴着一枚华丽的钻戒。

She found a gorgeous ___diamond ring on her finger.