| Site | Category |
| Fine Jewelry Photography | Advertising Agencies |
| Fr. Van den Eynde & Zn. | Diamond Cutters |
| Facets Singapore | Diamond Dealers - Wholesalers |
| Fandax Color Diamonds | Diamond Dealers - Wholesalers |
| FD Jaffe | Diamond Dealers - Wholesalers |
| First Canadian | Diamond Dealers - Wholesalers |
| Flanders Diamond Exporters NV | Diamond Dealers - Wholesalers |
| Florida Jewelery Appraisers | Diamond Dealers - Wholesalers |
| Fulgeodiamond | Diamond Dealers - Wholesalers |
| Fancydiam Inc | Diamond Manufacturers |
| FIBI INT'L | Diamond Manufacturers |
| FirstClass Diamonds | Diamond Manufacturers |
| Falcon Drilling | Diamond Mining |
| Firestone Diamonds PLC | Diamond Mining |
| Fancy Colored Diamonds Grading | Education |
| Fine Gems | Gemstone Dealers |
| Fair Line | Jewelry Manufacturers |
| Federici | Jewelry Manufacturers |
| FEDIDOFASHION JEWELRIES INC. | Jewelry Manufacturers |
| FIND YOUR JEWELRY | Jewelry Manufacturers |
| First Canadian | Jewelry Manufacturers |
| First Class Trading Inc. | Jewelry Manufacturers |
| Five Cee | Jewelry Manufacturers |
| Fourever Concept | Jewelry Manufacturers |
| Fraboso Bijoux | Jewelry Manufacturers |
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