| Business | Phone |
| Emkay Co 4600 14th Ave # 1f, Brooklyn 11219 | (718) 436-0083 |
| First Class Diamonds Llc 63 Flushing Ave, Brooklyn 11205 | (718) 855-4754 |
| Golden Diamonds 4417 5th Ave, Brooklyn 11220 | (718) 438-7888 |
| Marvin Hartstein Diamonds Inc 5417 18th Ave, Brooklyn 11204 | (718) 234-3450 |