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Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6551291620

Certificate GIA 6551291620

Diamond specifications and retailer prices

From HK$167,526 HKD
CA$29,655 CAD
As of November 2, 2026
Save HK$107,924 HKD (39%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$275,450 HKD at MOH London · As of November 2, 2026
View at MOH London

About this 2.51ct natural marquise diamond

This 2.51ct natural marquise sits in the two to three carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551291620. Listed at 11 retailers as of November 2, 2026, with prices from HK$167,526 to HK$275,450, a HK$107,924 spread on the same certified stone. MOH London lists it at HK$275,450. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.07°
OriginNatural
Grading LabGIA
CertificateGIA 6551291620
Dimensions13.51 × 7.14 × 4.53 mm
L/W Ratio1.89
Key to symbols
Twinning Wisp, Feather, Crystal, Needle
Top View
13.51 mm7.14 mm2.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551291620
Side View
Table 62.0%CrownGirdle: STK-VTKPavilion 40.07°Culet: NoneDepth 63.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$275,450 HKD|Low: HK$137,890 HKD|High: HK$278,768 HKD|Avg: HK$189,411 HKD|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 3, 2026
Retailer 9HK$137,890 HKD
Retailer 4HK$148,589 HKD
Retailer 8HK$150,628 HKD
Retailer 13HK$167,526 HKD
Retailer 3HK$168,572 HKD
Retailer 10HK$170,284 HKD
Retailer 12HK$180,989 HKD
Retailer 14HK$183,387 HKD
Retailer 18HK$185,592 HKD
Retailer 5HK$191,288 HKD
Retailer 7HK$191,288 HKD
Retailer 16HK$193,414 HKD
Retailer 6HK$197,643 HKD
Retailer 17HK$207,741 HKD
Retailer 15HK$208,333 HKD
Retailer 2HK$214,335 HKD
Retailer 11HK$249,859 HKD
MOH LondonHK$275,450 HKD

15 data points across 18 retailers

11 retailersHK$167,526 HKD to HK$275,450 HKD

A
Cheapest Retailer
-
HK$167,526 HKD
CA$29,655 CAD
A
Retailer 2
-
HK$168,572 HKD
$21,485 USD
View
A
Retailer 3
-
HK$180,989 HKD
£18,163 GBP
View
B+
Retailer 4
-
HK$183,387 HKD
$23,373 USD
View
Retailer 5
-
HK$185,592 HKD
$23,654 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
HK$193,414 HKD
$24,651 USD
View
B+
Retailer 7
-
HK$207,741 HKD
$26,477 USD
View
B+
Retailer 8
-
HK$208,333 HKD
€25,288 EUR
View
B
Retailer 9
-
HK$214,335 HKD
$27,317 USD
View
B
Retailer 10
-
HK$249,859 HKD
$31,845 USD
View
Most Expensive
B
MOH London
ED73D92D5 · Nov 2
HK$275,450 HKD
£27,643 GBP
View
10 more retailers have this diamond
Prices start from HK$167,526 HKDSave up to HK$107,924 HKD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
2.51ct Marquise
HK$167,526 HKD