CaratHunter
Plans
Marquise|Natural|GIA

2.51ct I SI2 Marquise Natural Diamond

EX • I/SI2

Diamond specifications and retailer prices

From HK$156,891 HKD
$19,996 USD
As of November 2, 2026
Save HK$55,111 HKD (26%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$252,338 HKD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

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. Listed at 11 retailers as of November 2, 2026, with a 35% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
OriginNatural
Grading LabGIA
Dimensions12.40 × 6.80 × 4.60 mm
L/W Ratio1.82
Top View
12.40 mm6.80 mm2.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 67.8%

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$252,338 HKD|Low: HK$156,891 HKD|High: HK$252,338 HKD|Avg: HK$194,915 HKD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 26, 2026
Retailer 3HK$156,891 HKD
Retailer 5HK$170,958 HKD
Retailer 8HK$178,122 HKD
Retailer 11HK$185,592 HKD
Retailer 4HK$187,027 HKD
Retailer 10HK$192,967 HKD
Retailer 9HK$197,376 HKD
Retailer 7HK$200,389 HKD
Retailer 2HK$208,021 HKD
Retailer 6HK$212,002 HKD
NZ JewellersHK$252,338 HKD

20 data points across 11 retailers

11 retailersHK$156,891 HKD to HK$212,002 HKD

A
Cheapest Retailer
-
HK$156,891 HKD
$19,996 USD
B+
Retailer 2
-
HK$170,958 HKD
CA$30,262 CAD
View
Retailer 3
-
HK$178,122 HKD
$22,702 USD
View
Price last confirmed 9 days ago
Retailer 4
-
HK$185,592 HKD
$23,654 USD
View
Price last confirmed 10 days ago
Retailer 5
-
HK$187,027 HKD
$23,837 USD
View
Price last confirmed 8 days ago
Retailer 6
-
HK$192,967 HKD
$24,594 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
HK$197,376 HKD
$25,156 USD
View
Retailer 8
-
HK$200,389 HKD
$25,540 USD
View
Price last confirmed 11 days ago
Retailer 9
-
HK$208,021 HKD
£20,876 GBP
View
Price last confirmed 8 days ago
B
Retailer 10
-
HK$212,002 HKD
$27,020 USD
View
Most Expensive
NZ Jewellers
87e3a822-8f96-461c-8f32-700b8029eee0 · Oct 24
HK$252,338 HKD
$32,161 USD
View
Price last confirmed 10 days ago
10 more retailers have this diamond
Prices start from HK$156,891 HKDSave up to HK$55,111 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$156,891 HKD