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Marquise|Natural|GIA

2.51ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 17154894

Certificate GIA 17154894

Diamond specifications and retailer prices

From HK$211,586 HKD
$26,967 USD
As of November 2, 2026
Save HK$190,055 HKD (47%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: HK$401,641 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 17154894. Listed at 10 retailers as of November 2, 2026, with prices from HK$211,586 to HK$401,641, a HK$190,055 spread on the same certified stone. MOH London lists it at HK$401,641. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 17154894
Dimensions12.71 × 7.07 × 4.63 mm
L/W Ratio1.80
Top View
12.71 mm7.07 mm2.51 ctG / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 17154894
Side View
Table 57.0%CrownGirdle: Very ThickPavilionCuletDepth 65.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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$401,641 HKD|Low: HK$209,616 HKD|High: HK$406,484 HKD|Avg: HK$283,002 HKD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 6HK$211,586 HKD
Retailer 2HK$245,622 HKD
Retailer 5HK$256,773 HKD
Retailer 4HK$259,023 HKD
Retailer 3HK$311,955 HKD
MOH LondonHK$401,641 HKD

41 data points across 6 retailers

10 retailersHK$211,586 HKD to HK$401,641 HKD

B+
Cheapest Retailer
-
HK$211,586 HKD
$26,967 USD
B+
Retailer 2
-
HK$228,187 HKD
$29,083 USD
View
B+
Retailer 3
-
HK$233,421 HKD
A$45,769 AUD
View
Retailer 4
-
HK$245,622 HKD
$31,305 USD
View
Price last confirmed 12 days ago
Retailer 5
-
HK$245,622 HKD
$31,305 USD
View
Price last confirmed 26 days ago
B+
Retailer 6
-
HK$245,622 HKD
$31,305 USD
View
Retailer 7
-
HK$256,773 HKD
A$50,348 AUD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
HK$259,023 HKD
£25,994 GBP
View
B
Retailer 9
-
HK$311,955 HKD
€37,866 EUR
View
Most Expensive
B
MOH London
12C425ADA · Nov 2
HK$401,641 HKD
£40,307 GBP
View
9 more retailers have this diamond
Prices start from HK$211,586 HKDSave up to HK$190,055 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.

B+
2.51ct Marquise
HK$211,586 HKD