Lab System

About Gem Testing Lab System

Gem’s Identification and diamond grading certification is main facility at ZGTL Nagpur, MH. Every Specimen is compulsorily examined by Gemologist. Every report issued by ZGTL Nagpur, MH is based on Gemological properties, Gemological Instruments and Gemologist experience.

ZGTL Nagpur, MH certificate is not valuation or appraisal and does not pertain to the quality of the stone or its cut.

Every certificate issued by ZGTL Nagpur, MH is laminated and will carry a photograph of specimen/s being tested.

ZGTL Nagpur, MH will not e hold responsible for use certificate with any other similar appearing specimen.

ZGTL Nagpur, MH – Issued all types of Gemstone Certificate.

  • Loose Rough – (well formed crystal or broken)
  • Loose Cut unmounted – (pre form, faceted, cabochon, Bead’s Drilled / Undrilled)
  • Studded in Jewelry mounted– (Rings, ear tops, bangle, nose pin, bracelet, locket etc.)
  • Carving material – (Ganesh murti, Shreeyantra, Quartz, etc.)
  • Beades – (strung on thread/wire)

    • Origin Identification

    The determination of origin of a gemstone is requires a lot of experience master set of stones reference and state of the art technology.

    ZGTL Nagpur, MH (ZEROMILE GEM TESTING LABORATORY) is providing origin of identification services for Ruby, Sapphire and emerald.

    Treatment Identification

    Most of the gemstone are treated some of the same other method to improve the quality and overall appearance of gemstones. The improvement in quality makes the stones more valuable. ZGTL Nagpur, MH identifies the treatment done on gemstones to bring more transparency in the trade.

    For disclosure of the treatment ZGTL Nagpur, MH is strictly following the CIBIO guidelines and describing the treatment in treatment identification reports.

  • Heat treatment in Ruby and Sapphire
  • Glass filling in Ruby and Sapphire
  • Beryllium treatment in Ruby and Sapphire
  • Fracture filling in Diamond
  • Oil/resin filling in Emerald

    •       NOTE:- Pearl identification is not available here(Brad).