a diamond + noun
diamond 作形容词时通常只用在名词前，表示‘钻石制的’或指六十/七十五周年，如 diamond anniversary（六十周年纪念）。
She wore a diamond necklace at the party.
她在聚会上戴着一条钻石项链。
六十周年纪念的；七十五周年纪念的；由钻石制成或含有钻石；与六十周年纪念相关的；与七十五周年纪念相关的
made of or containing diamond
由钻石制成或含有钻石
Made of, or containing diamond, a diamond or diamonds.
与六十周年纪念相关的
Of, relating to, or being a sixtieth anniversary.
与七十五周年纪念相关的
Of, relating to, or being a seventy-fifth anniversary.
She wore a diamond necklace to the evening party.
她戴着一条钻石项链去参加晚会。
用法提示：diamond 作形容词修饰 necklace，表示“钻石制的”。
The store window displayed a diamond bracelet under the light.
商店橱窗在灯光下展示了一条钻石手链。
用法提示：diamond 作形容词修饰 bracelet，表示“镶钻的/含钻石的”。
He bought her a diamond brooch for her birthday.
他为她的生日买了一枚钻石胸针。
用法提示：diamond 作形容词修饰 brooch，表示“含钻石的”。
diamond 作形容词时通常只用在名词前，表示‘钻石制的’或指六十/七十五周年，如 diamond anniversary（六十周年纪念）。
She wore a diamond necklace at the party.
她在聚会上戴着一条钻石项链。
grammar · medium
易错句子He gave her a diamond's necklace.
正确表达He gave her a diamond necklace.
这里的 diamond 是形容词，直接放在名词前作定语，表示“钻石制的/镶钻石的”。汉语“钻石的项链”中的“的”不能照搬成所有格 's；'s 只用于人或事物的领属关系，不表示材质。
grammar · medium
易错句子She bought a necklace of diamond.
正确表达She bought a diamond necklace.
表示“用某种材料制成”时，英语用材料名词直接作定语（diamond necklace），不用“of + 单数材料名词”。若要保留 of 结构，只能接可数复数，表示由多颗钻石组成：a necklace of diamonds。
grammar · medium
易错句子His watch is diamond.
正确表达His watch is made of diamond.
diamond 作形容词时只能位于名词之前作定语，不能放在 be 动词后作表语。要表达“表是钻石的/钻石制的”，需改用 be made of + 材料名词，或说 a diamond watch。
钻石戒指
He gave her a diamond ring for their anniversary.
他在他们的周年纪念日送了她一枚钻石戒指。
钻石项链
She wore a diamond necklace to the party.
她戴着一条钻石项链去参加派对。
钻石手链
He bought a diamond bracelet for his wife's birthday.
他为妻子的生日买了一条钻石手链。
钻禧（登基六十周年或七十五周年纪念）
The town held a parade for the queen's diamond jubilee.
全镇为女王的钻禧纪念举行了游行。
钻石婚纪念（六十周年）
They celebrated their diamond anniversary with the whole family.
他们和全家人一起庆祝了钻石婚纪念。
钻石婚（结婚六十周年）
My grandparents are planning a party for their diamond wedding.
我的祖父母正在为他们的钻石婚筹办派对。
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