What is the synonym for diamond?

There isn't a single perfect synonym for "diamond," as the word has multiple meanings. Here are some options depending on the context:

For the gemstone:

* Gem: This is a general term for any precious stone.

* Jewel: Similar to "gem," this refers to a precious stone, often used in jewelry.

* Brilliant: This emphasizes the sparkle and brilliance of a diamond.

* Adamant: This word conveys the diamond's hardness and durability.

* Carbonado: This refers to a specific type of very hard diamond.

For other meanings of "diamond:

* Shape: If "diamond" refers to the shape, "rhombus" or "lozenge" can be used.

* Playing card: For the card suit, "spade" is the synonym.

* Baseball: In baseball, "diamond" can refer to the infield. Here, "field" or "infield" are synonyms.

To give you the best synonym, please tell me what context you are using the word "diamond" in.