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Marquise|Natural|GIA

0.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6542875575

Certificate GIA 6542875575

Diamond specifications and retailer prices

From HK$3,224 HKD
As of November 5, 2026
Save HK$9,124 HKD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$12,348 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542875575. Listed at 11 retailers as of November 5, 2026, with prices from HK$3,224 to HK$12,348, a HK$9,124 spread on the same certified stone. NZ Jewellers lists it at HK$12,348. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542875575
Dimensions8.25 × 4.10 × 2.70 mm
L/W Ratio2.01
Top View
8.25 mm4.10 mm0.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6542875575
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.9%

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 5
Current: HK$12,348 HKD|Low: HK$3,224 HKD|High: HK$12,733 HKD|Avg: HK$4,846 HKD|-3.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9HK$3,224 HKD
Retailer 7HK$3,468 HKD
Retailer 3HK$3,507 HKD
Retailer 4HK$3,507 HKD
Retailer 8HK$3,719 HKD
Retailer 10HK$3,719 HKD
Retailer 2HK$3,930 HKD
Retailer 5HK$3,946 HKD
Retailer 11HK$4,903 HKD
Retailer 6HK$7,429 HKD
NZ JewellersHK$12,348 HKD

36 data points across 11 retailers

11 retailersHK$3,224 HKD to HK$12,348 HKD

A
Cheapest Retailer
-
HK$3,224 HKD
A
Retailer 2
-
HK$3,468 HKD
View
Retailer 3
-
HK$3,507 HKD
View
Price last confirmed 8 days ago
A
Retailer 4
-
HK$3,507 HKD
View
A
Retailer 5
-
HK$3,719 HKD
View
A
Retailer 6
-
HK$3,719 HKD
View
A
Retailer 7
-
HK$3,930 HKD
View
A
Retailer 8
-
HK$3,946 HKD
View
B+
Retailer 9
-
HK$4,903 HKD
View
B
Retailer 10
-
HK$7,429 HKD
View
Most Expensive
B
NZ Jewellers
6fbe9dc0-4941-4bfd-b195-6b925748c946 · Nov 5
HK$12,348 HKD
$1,574 USD
View
10 more retailers have this diamond
Prices start from HK$3,224 HKDSave up to HK$9,124 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$3,224 HKD