Diamond Supply Co. The California based skateboard accessory and clothing line was started in 1998 by skateboarder/designer Nick Tershay AKA Nick Diamond. Tershay has gained worldwide recognition and celebrity stardom for his cutting edge tee shirt designs and the sneaker collaboration with Nike SB that he designed. The Diamond "Tiffany" Dunk SB was the hottest sneaker release in 2005 which had massive amounts of sneakerheads around the world camping out in front of stores for days before the shoe released. It is said that this shoe was the most hyped and sought after shoe in Nike history. The Diamond dunk SB had such a large impact on the sneaker community "good & bad" that it has changed the sneaker game forever.

Diamond Supply Co. clothing has also been seen worn by superstar rappers such as lil Wayne, Tony Yayo and Lupe Fiasco.

Diamond Supply Co. have just opened their first store on Fairfax, L.A, sitting alongside stores such as Supreme, Flight Club LA and The Hundreds.