Our Operations Our diamonds endure quite a process from their beginnings as rough, unattractive stones to becoming the priceless, stunning jewels that our clients love and cherish. Downtown Diamonds tenders for, as well as uses the services of the most highly regarded mines to purchase our rough stones. Once sourced, the diamonds are expertly sorted from most valuable stones. Each stone is then thoroughly analyzed to ascertain its grading and light performance. The diamonds are polished to a brilliant shine and finally endure a thorough inspection to make sure that they meet the high standards that our clients have come to expect from Downtown Diamonds.