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1.
1. Someone that sells diamonds.

2. Derogatory term for a Jewish person. Made famous by the so-called Reverend and bigot Al Sharpton during the Crown Heights Riot of 1991.
1. That diamond merchant ripped me off good.

2. Al: "Sorry, but we don't have room for the diamond merchant."
Jesse: "Yes we do, just stick him in the ashtray!"
by Deathgrind > you October 19, 2007
 
2.
A person whose profession is buying and selling diamonds for profit; dealer; trader.
One who trades in diamonds and possesses expertise in the area of diamonds and the practices of trading in them.
Being an expert in diamonds, Steve the diamond merchant in Scottsdale would be helpful in buying a certified diamond that is of correct value.

by dream4diamonds October 18, 2007