noun

diamond

diamond, rhombus, lozenge

She wore a beautiful diamond necklace.

She wore a beautiful diamond necklace.

The kite was a diamond shape.

The kite was a diamond shape.

He played the ace of diamonds.

He played the ace of diamonds.

((noun)) as an adjective to describe something made of or shaped like a diamond. She received a diamond ring.

((of sth.)) used for playing cards. He played the queen of diamonds.

Synonyms: (gem) gem, jewel; (shape) rhombus, lozenge

From Old French 'diamant', from Latin 'adamas' meaning 'unconquerable, hard', from Greek 'adamas'.

A diamond is the hardest gem, making it 'adamant' or unconquerable. The shape is like two triangles base-to-base.

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