Asscher Cut Diamonds
Asscher cut diamonds are nearly identical in shape to Emerald shape diamonds, except that Asscher cut diamonds are square. Like Emerald cuts, this shape draws attention to the clarity of the diamonds so be sure to view the clarity plot on the diamond certificate before you purchase.
Like Emerald cut diamonds, Asccher cut diamonds have copped corners.
An Asscher cut diamond looks like this:

Tataza Diamonds has a great selection of Asscher cut diamonds.