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Marquise|Natural|IGI

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • IGI 839658603

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839658603

Diamond specifications and retailer prices

From HK$2,856 HKD
₹34,669 INR
As of October 31, 2026
Save HK$11,518 HKD (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: HK$14,374 HKD at NZ Jewellers · As of October 30, 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 and certified by IGI 839658603. Listed at 12 retailers as of October 30, 2026, with prices from HK$2,856 to HK$14,374, a HK$11,518 spread on the same certified stone. NZ Jewellers lists it at HK$14,374. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle39.5°
OriginNatural
Grading LabIGI
CertificateIGI 839658603
Dimensions8.28 × 4.16 × 2.59 mm
L/W Ratio1.99
Girdle conditionFaceted
Top View
8.28 mm4.16 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 839658603
Side View
Table 60.0%Crown 37.3°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.3%

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: Oct 31
Current: HK$14,374 HKD|Low: HK$2,849 HKD|High: HK$14,374 HKD|Avg: HK$5,269 HKD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 2HK$2,856 HKD
Retailer 3HK$3,452 HKD
Retailer 5HK$3,570 HKD
Retailer 13HK$3,750 HKD
Retailer 11HK$4,041 HKD
Retailer 4HK$4,331 HKD
Retailer 8HK$4,618 HKD
Retailer 12HK$4,872 HKD
Retailer 6HK$4,908 HKD
Retailer 7HK$5,223 HKD
Retailer 10HK$5,332 HKD
Retailer 9HK$8,669 HKD
NZ JewellersHK$14,374 HKD

14 data points across 13 retailers

12 retailersHK$2,856 HKD to HK$14,374 HKD

A
Cheapest Retailer
-
HK$2,856 HKD
₹34,669 INR
Retailer 2
-
HK$3,570 HKD
$455 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
HK$3,750 HKD
$478 USD
View
A
Retailer 4
-
HK$4,041 HKD
$515 USD
View
A
Retailer 5
-
HK$4,331 HKD
$552 USD
View
A
Retailer 6
-
HK$4,618 HKD
£463 GBP
View
B+
Retailer 7
-
HK$4,872 HKD
$621 USD
View
B+
Retailer 8
-
HK$4,908 HKD
£493 GBP
View
B+
Retailer 9
-
HK$5,223 HKD
€634 EUR
View
B+
Retailer 10
-
HK$5,332 HKD
$680 USD
View
Retailer 11
-
HK$8,669 HKD
£870 GBP
View
Price last confirmed 7 days ago
Most Expensive
B
NZ Jewellers
8931b356-73f5-4507-8694-f0697f6376fd · Oct 30
HK$14,374 HKD
$1,832 USD
View
11 more retailers have this diamond
Prices start from HK$2,856 HKDSave up to HK$11,518 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$2,856 HKD