CaratHunter
Plans
Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 1553998649

Certificate GIA 1553998649

Diamond specifications and retailer prices

From HK$3,809 HKD
As of November 6, 2026
Save HK$10,455 HKD (73%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$14,264 HKD at NZ Jewellers · As of November 5, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553998649. Listed at 15 retailers as of November 5, 2026, with prices from HK$3,809 to HK$14,264, a HK$10,455 spread on the same certified stone. NZ Jewellers lists it at HK$14,264. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1553998649
Dimensions8.72 × 4.07 × 2.52 mm
L/W Ratio2.14
Key to symbols
Twinning Wisp, Feather
Top View
8.72 mm4.07 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1553998649
Side View
Table 55.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 61.9%

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 6
Current: HK$14,264 HKD|Low: HK$3,707 HKD|High: HK$14,264 HKD|Avg: HK$6,000 HKD|+3.6%
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
Retailer 14
Retailer 15
November 6, 2026
Retailer 4HK$3,809 HKD
Retailer 3HK$4,193 HKD
Retailer 9HK$4,546 HKD
Retailer 15HK$4,624 HKD
Retailer 6HK$4,734 HKD
Retailer 10HK$4,898 HKD
Retailer 14HK$4,898 HKD
Retailer 7HK$5,251 HKD
Retailer 13HK$5,251 HKD
Retailer 2HK$5,400 HKD
Retailer 8HK$5,525 HKD
Retailer 5HK$5,596 HKD
Retailer 11HK$6,709 HKD
Retailer 12HK$10,494 HKD
NZ JewellersHK$14,264 HKD

30 data points across 15 retailers

15 retailersHK$3,809 HKD to HK$14,264 HKD

A
Cheapest Retailer
-
HK$3,809 HKD
A
Retailer 2
-
HK$4,193 HKD
View
Final sale: no returns
A
Retailer 3
-
HK$4,546 HKD
View
Retailer 4
-
HK$4,624 HKD
View
Price last confirmed 19 days ago
Retailer 5
-
HK$4,734 HKD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
HK$4,898 HKD
View
Retailer 7
-
HK$4,898 HKD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
HK$5,251 HKD
View
Retailer 9
-
HK$5,251 HKD
View
Price last confirmed 19 days ago
B+
Retailer 10
-
HK$5,400 HKD
View
B+
Retailer 11
-
HK$5,525 HKD
View
B+
Retailer 12
-
HK$5,596 HKD
View
B
Retailer 13
-
HK$6,709 HKD
View
B
Retailer 14
-
HK$10,494 HKD
View
Most Expensive
B
NZ Jewellers
8c553993-763c-4d33-980b-770d3b9d2d4f · Nov 5
HK$14,264 HKD
$1,820 USD
View
14 more retailers have this diamond
Prices start from HK$3,809 HKDSave up to HK$10,455 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$3,809 HKD