| Site | Category |
| kadranet web agency | Advertising Agencies |
| Kaplans | Auctions |
| K P Sanghvi & Sons | Diamond Cutters |
| Kay Diamonds NV | Diamond Cutters |
| Kay Jewels NV | Diamond Cutters |
| K P Sanghvi & Sons | Diamond Dealers - Wholesalers |
| K. Girdharlal | Diamond Dealers - Wholesalers |
| Kay Diamonds NV | Diamond Dealers - Wholesalers |
| Kay Jewels NV | Diamond Dealers - Wholesalers |
| Kiran Exports | Diamond Dealers - Wholesalers |
| Kling Gabriele | Diamond Dealers - Wholesalers |
| Koh-I-Noor Diamonds AG | Diamond Dealers - Wholesalers |
| Koss Diamonds | Diamond Dealers - Wholesalers |
| KRAIKO DIAMONDS | Diamond Dealers - Wholesalers |
| Krishna Dimon | Diamond Dealers - Wholesalers |
| Kultasepänliike Suokko | Diamond Dealers - Wholesalers |
| K P Sanghvi & Sons | Diamond Districts |
| Kay Jewels NV | Diamond Districts |
| keyguide ltd. | Diamond Districts |
| K P Sanghvi & Sons | Diamond Manufacturers |
| K.R.I.S. DIAMONDS | Diamond Manufacturers |
| Karp Impex Ltd. | Diamond Manufacturers |
| Kay Diamonds NV | Diamond Manufacturers |
| Kay Jewels NV | Diamond Manufacturers |
| Kesel Diamonds | Diamond Manufacturers |
|