Commercial Diamonds

Authenticity verification and quality grading unmounted diamond, applying the GIA grading system.
(Fee according to Diamond Price Table).

Follow-up Grading of Repolished Diamonds
(Fee according to Diamond Price Table with 50% reduction*)
*applicable only upon return of previous original report

Diamond Identification Using Infra-Red Spectrometer
(Fee according to Diamond Price Table with SGD100 surcharge)

Diamond Price Guide
Weight in Carat	Fee in Singapore $
Up to 0.99 ct	$150/-
1.50 to 1.99 ct	$250/-
2.00 to 2.99 ct	$350/-
3.00 to 4.99 ct	$450/-
5.00 to 6.99 ct	$750/-
7.00 to 9.99 ct	$1,000/-
10.00 to 14.99 ct	$1,500/-
15.00 to 19.99 ct	$2,000/-
20.00 to 29.99 ct	$3,000/-
50.00 to 99.99 ct	$4,000/-
100.00 & above	$5,000/-

Authenticity determination of natural gemstones, respectively identification of synthetic and imitation stones.

Natural Gemstones
Authenticity determination and identification of treatment like heat treatment, diffusion process glassy filling in ruby and sapphire.
(Fee according to Gemstones Price Table).

Gemstones Price Guide
Weight in Carat	Fee in Singapore $
Up to 5.00 ct	$150/-
5.01 to 9.99 ct	$250/-
10.00 to 19.99 ct	$350/-
20.00 to 39.99 ct	$550/-
40.00 to 49.99 ct	$750/-
50.00 & above	$1,000/-

Identification of Jadeite-Jade
Further test on treatment using infra-red spectrometer to identify the presence polymer.
(Fee according to Diamond Price Table with surcharge of SGD100).

Express testing (within one working day)
(Fee according to Gemstones Price Table with surcharge of SGD150).

Ring, Pendant, Bracelet
(Fee according to Gemstones Price Table).

Estate Appraisal
Depend on the amount, price negotiable.