| Business | Phone |
| California Diamond Co 629 S Hill St, Los Angeles 90014 | (213) 892-0855 |
| Coral Diamond's 550 S Hill St # 1292, Los Angeles 90013 | (213) 688-1087 |
| Mc Kinley & Whitney Micron Svc 1200 W 7th St # 110, Los Angeles 90017 | (213) 622-9897 |
| Gems Trade Of America 550 S Hill St # 650, Los Angeles 90013 | (213) 622-6969 |