Er. P.K. Jain
F- 1, Green Park
New Delhi- 110016, Delhi (India)
Gemological Studies Of India Private Limited
No. 50, Amrit Nagar, South Extention1
New Delhi- 110003, Delhi (India)
IDGL Diamond Testing Laboratory
No. 208, 2nd Floor, Gurudwara Road, Karol Bagh
New Delhi- 110005, Delhi (India)
Stuti Hallmarking
8th Floor, C-1,2,3, Netaji Subhash Palace, PP Tower, Pitampura
New Delhi- 110034, Delhi (India)
Jyotisha Remedies
C-150, West Patel Nagar
New Delhi- 110008, Delhi (India)
Institute Of Ancient Gemology
No. 5/58, 3rd Floor, Opposite Metro Station Gate No. 1, Tilak Nagar
New Delhi- 110018, Delhi (India)
European Gemological Laboratory
2705/24, 1st Floor, Bank Street, Karol Bagh
New Delhi- 110005, Delhi (India)