New Words：

ruby [ˈrubi] n. 红宝石；深红色
diamond [ˈdaɪəmənd] n. 钻石；金刚石；菱形
emerald [ˈemərəld] n. 翡翠；祖母绿；绿宝石；翡翠绿

Sample Sentences：

A ruby is a dark red jewel.
She wears a diamond ring on her left hand.
It's made of gold and in the middle there's a big green emerald.

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