| Business | Phone |
| Horowitz & Atlass 15 W 47th St # 705, New York 10036 | (212) 768-4566 |
| Joseph A Diamonds Inc 55 W 47th St, New York 10036 | (212) 730-4181 |
| Leon Dimston Co 608 5th Ave # 406, New York 10020 | (212) 245-5450 |
| #1 Diamond Source 36 W 47 ST, New York 10036 | (877) 968-7342 |