| Business | Phone |
| Djabourian Gold Assaying 610 S Broadway, Los Angeles 90014 | (323) 623-1099 |
| Gold Assaying Center 411 W 7th St # 514, Los Angeles 90014 | (213) 622-6287 |
| M G Gold Assaying 629 S Hill St # 318, Los Angeles 90014 | (213) 622-1551 |
| Rms Gold Assaying 629 S Hill St # 1201, Los Angeles 90014 | (213) 489-2343 |