Open an Account To open an account with Grunberger Diamonds, please fill-out and complete all the downloadable PDF files below. Once completed and sent, someone from our team to will reach back out to confirm your account is active. Resale-Certificate Download Credit-Application Download AML-Form Download Open an Account Name Email Phone NumberChoose a fileMax. file size: 50 MB.Choose a fileMax. file size: 50 MB.Choose a fileMax. file size: 50 MB.