Where to find a wedding ring?

Okay well as you know Black Friday is tomorrow and everything goes a cheaper price. My dad has given me the job to find my mom a wedding ring thats very nice at least 1 carat and a budget of $800.00. My dad said for it to be in a store close lik a department store such as Macys or Jc Pennys. But if tis really nic from a different store its okay. please give me the link for the ring