GIA Melee Analysis Service

To address concerns about laboratory-grown and treated diamonds being mixed into parcels of melee, GIA has developed an automated system to analyse and sort melee-size diamonds quickly and accurately.

The GIA Melee Analysis Service separates natural diamonds from simulants, laboratory-grown and HPHT treated natural diamonds, and sorts the screened diamonds by colour range. Clients can also specify a size range for their parcel. Once sorted, the melee will be sealed in secure packaging for shipment back to the submitting client.



  • Separates natural, untreated diamonds from simulants, laboratory-grown and HPHT treated natural diamonds
  • D-to-Z diamonds with colour sorting options
    • D-to-F, G-to-H, I-to-J, K-to-Z (default)
    • D-to-G, H-to-I, J-to-K, L-to-Z
    • D-to-F, G-to-I,J-to-L,M-to-Z
    • No Colour Sorting
  • Screens 1,800 to 2,000 stones per hour
  • Secure packaging



  • Melee 0.9 to 4.0mm (approx. 0.005 to 0.25 ct.)
  • D-to-Z diamonds
  • Round shape only
  • Items must be thoroughly cleaned prior to submission


Complimentary pick-up and drop-off available between GIA’s laboratory in Mumbai and locations within Mumbai (BDB), as well as Ahmedabad, Surat, Jaipur, New Delhi, Kolkata, Hyderabad, Coimbatore, Thrissur and Chennai.



Diameter Range
Fees per Stone
Minimum Parcel
Size (In no. of Stones)
0.90 – 1.09 3.00  200 
1.10 – 1.14 3.50  175
1.15 – 1.19 4.00  150 
1.20 – 1.24 5.00 120
1.25 – 1.49 5.00 110 
1.50 – 1.99 6.50 70 
2.00 – 2.49 10.00 50
2.50 – 2.99 13.00 50
3.00 – 3.49 16.00 50
3.50 – 4.00 26.00 50

All stones outside service criteria will be charged 13.00 INR per stone.
The submission minimums listed above apply to Mumbai location only.
Fees and service details subject to change without notice.

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About GIA

Established in 1931, GIA protects the public through gemmological research, education, impartial gem identification and grading services, and instrument development. The world’s foremost authority in gemmology and creator of the 4Cs, GIA sets the standard for determining the quality of diamonds and performs research-based identification of coloured gems and pearls. All of GIA's activities are governed by its mission to serve the public. Learn more.