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Marquise|Natural|GIA

0.51ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 7551413826

Certificate GIA 7551413826

Diamond specifications and retailer prices

From HK$2,651 HKD
₹32,182 INR
As of November 2, 2026
Save HK$5,609 HKD (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$12,679 HKD at NZ Jewellers · As of October 6, 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 J 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 7551413826. Listed at 9 retailers as of November 2, 2026, with a 212% 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 7551413826
Dimensions7.66 × 4.15 × 2.68 mm
L/W Ratio1.85
Girdle conditionSlightly Thick to Very Thick
Key to symbols
Cloud, Crystal
Top View
7.66 mm4.15 mm0.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 7551413826
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 64.5%

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$2,651 HKD|Low: HK$2,646 HKD|High: HK$9,426 HKD|Avg: HK$4,749 HKD|-12.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 1HK$2,651 HKD
Retailer 4HK$3,013 HKD
Retailer 6HK$3,774 HKD
Retailer 5HK$3,837 HKD
Retailer 2HK$5,823 HKD
Retailer 3HK$8,261 HKD

46 data points across 6 retailers

9 retailersHK$2,651 HKD to HK$8,261 HKD

A
Cheapest Retailer
-
HK$2,651 HKD
₹32,182 INR
A
Retailer 2
-
HK$3,013 HKD
View
Retailer 3
-
HK$3,774 HKD
SGD 650 SGD
View
Price last confirmed 8 days ago
Retailer 4
-
HK$3,837 HKD
$489 USD
View
Price last confirmed 13 days ago
Retailer 5
-
HK$3,939 HKD
$502 USD
View
Price last confirmed 32 days ago
Retailer 6
-
HK$4,041 HKD
$515 USD
View
Price last confirmed 26 days ago
B+
Retailer 7
-
HK$5,823 HKD
£584 GBP
View
B
Retailer 8
-
HK$8,261 HKD
£829 GBP
View
Most Expensive
NZ Jewellers
505a9c11-f64e-4cd1-b033-5cfdd55d25aa · Oct 6
HK$12,679 HKD
$1,616 USD
View
Price last confirmed 27 days ago
8 more retailers have this diamond
Prices start from HK$2,651 HKDSave up to HK$5,609 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$2,651 HKD