| Business | Phone |
| Belgium International Diamond 1424 4th Ave 825, Seattle 98101 | (206) 622-3677 |
| Blue Nile Inc 705 5th Ave S 900, Seattle 98104 | (206) 336-6700 |
| Exact Gems Intl 2133 3rd Ave 238, Seattle 98121 | (206) 956-8324 |
| Five Diamonds 1020 5th Ave N, Seattle 98109 | (206) 270-5437 |
| Flom Diamond Inc 1425 4th Ave 602, Seattle 98101 | (206) 622-9030 |