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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 2547681359

Certificate GIA 2547681359

Diamond specifications and retailer prices

From HK$4,318 HKD
As of November 1, 2026
Save HK$7,509 HKD (63%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: HK$16,061 HKD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded I 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 2547681359. Listed at 19 retailers as of November 1, 2026, with a 174% 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

0.51
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2547681359
Dimensions8.18 × 4.16 × 2.67 mm
L/W Ratio1.97
Top View
8.18 mm4.16 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2547681359
Side View
Table 59.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 64.3%

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 1
Current: HK$6,249 HKD|Low: HK$4,723 HKD|High: HK$11,967 HKD|Avg: HK$7,350 HKD|+5.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 2026
Retailer 6HK$4,723 HKD
Retailer 8HK$6,073 HKD
Retailer 1HK$6,249 HKD
Retailer 5HK$6,591 HKD
Retailer 3HK$6,863 HKD
Retailer 9HK$7,382 HKD
Retailer 7HK$7,702 HKD
Retailer 4HK$7,906 HKD
Retailer 2HK$11,828 HKD

44 data points across 9 retailers

19 retailersHK$4,318 HKD to HK$11,828 HKD

A
Cheapest Retailer
-
HK$4,318 HKD
A
Retailer 2
-
HK$4,723 HKD
$602 USD
View
Final sale: no returns
B+
Retailer 3
-
HK$5,124 HKD
$653 USD
View
B+
Retailer 4
-
HK$5,124 HKD
$653 USD
View
B+
Retailer 5
-
HK$5,320 HKD
$678 USD
View
B+
Retailer 6
-
HK$5,365 HKD
SGD 924 SGD
View
B+
Retailer 7
-
HK$5,908 HKD
$753 USD
View
B+
Retailer 8
-
HK$6,073 HKD
$774 USD
View
B+
Retailer 9
-
HK$6,158 HKD
$785 USD
View
B+
Retailer 10
-
HK$6,249 HKD
£627 GBP
View
B
Retailer 11
-
HK$6,591 HKD
$840 USD
View
B
Retailer 12
-
HK$6,863 HKD
€833 EUR
View
B+
Retailer 13
-
HK$7,048 HKD
$898 USD
View
Retailer 14
-
HK$7,177 HKD
$915 USD
View
Price last confirmed 7 days ago
B
Retailer 15
-
HK$7,382 HKD
$941 USD
View
Retailer 16
-
HK$7,702 HKD
A$1,510 AUD
View
Price last confirmed 29 days ago
B
Retailer 17
-
HK$7,906 HKD
ZAR 16,278 ZAR
View
B
Retailer 18
-
HK$11,828 HKD
£1,187 GBP
View
Most Expensive
NZ Jewellers
8fc8395c-49aa-4154-9434-046bd2f4a0ba · Nov 3
HK$16,061 HKD
$2,047 USD
View
Price under review
18 more retailers have this diamond
Prices start from HK$4,318 HKDSave up to HK$7,509 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
0.51ct Marquise
HK$4,318 HKD