| Name | Phone | Course Name 1 | Course Name 2 | Course Name 3 | Course Name 4 | |
|---|---|---|---|---|---|---|
| Patrick Abdel Karim | patrickak@squaredk.com | +9613065556 | — | Certified diamond grader | — | — |
| Crystal Ang | angpohchin2015@gmail.com | +6591590153 | — | Certified Diamond Grader | — | — |
| Yuliia Siadneva | bokalo.julia@gmail.com | +48888557983 | — | Certified Diamond Grader | — | — |
| Serge Serge | ztxmail775@gmail.com | 89669983434 | — | AnthonyKip | — | — |
| Jose Antonio Mejia Granados | jamg447@gmail.com | +524561018313 | — | APPRAISAL OF ROUGH DIAMONDS | — | — |
| Jana Wazne | janawazne@gmail.com | +32476769925 | — | Diamond grading | — | — |
| Eric Charbit | epcharbit@hotmail.com | +33745437971 | — | Diamond Grading | — | — |
| Carolina Lazzaro | carolinalazz00@gmail.com | +393935718866 | — | Certified diamond grader | — | — |
| Test Test | mehdirezaie5824@gmail.com | +918108849398 | — | Test | — | — |
| Charie Dolina | ck.dolina@gmail.com | +15147158564 | — | HRD Diamond Professional | — | — |
| DIEUDONNÉ NGAH NOAH | noahpichichi@yahoo.fr | +237699217118 | — | Appraisal of rough diamonds : ARDE112502 | — | — |
| Nitin Pawaskar | prime.designs@gmail.com | +919325409718 | — | Online Jewellery Consultancy Course | — | — |
| Denis Vlasov | vlasovdv@gmail.com | +79267116527 | — | Diamond grading and identification | — | — |
| janvi maheta | janvimehta8160@gmail.com | +918160783979 | — | Jewellery and gemstone | — | — |
| Sasirinda Waragoda | sasiwaragoda@gmail.com | +966582202742 | — | Certified Diamond and Diamond Grading | — | — |
| Mishel Markovski | mishelmarkovski@gmail.com | +33660429090 | — | Certified Diamond Grader | — | — |
| Daniel Penescu | dan.penescu@camelianjewelry.ro | +40745189165 | — | CDGE112205 Diamond Grader Diploma | — | — |
| Elisabeth Looijschelder | lies.looij@gmail.com | +32474264646 | — | Diamond grading(polished diamonds) | — | — |
| Krzysztof Niewiadomski | krzysztof.niewiadomski@gmail.com | +447858782578 | — | Diamond Grading and Identification | — | — |
| Paulina Podgrudna | paulina.podgrudna@auroria.pl | +48519328510 | — | Certified Diamond Grader | — | — |
| Hussein Mahmoud | hussenmahmoud50@gmail.com | +201200243208 | — | Diamond grader and identifier | — | — |
| Soha Hemati | sohaart3@gmail.com | +989910836306 | — | Soha | — | — |
| Mohamed Hamdan | hamdanmhmd974@gmail.com | +97455320760 | — | Certified Diamond Grader | — | — |
| KATARZYNA DEPA | depakatarzyna@gmail.com | +48530793933 | — | Diamond Grader Course | — | — |