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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6551764597

Certificate GIA 6551764597

Diamond specifications and retailer prices

From HK$4,256 HKD
As of November 3, 2026
Save HK$9,091 HKD (68%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: HK$13,347 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551764597. Listed at 6 retailers as of November 3, 2026, with prices from HK$4,256 to HK$13,347, a HK$9,091 spread on the same certified stone. NZ Jewellers lists it at HK$13,347. 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
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551764597
Dimensions7.98 × 3.83 × 2.38 mm
L/W Ratio2.08
Girdle conditionThick
Key to symbols
Twinning Wisp
Top View
7.98 mm3.83 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551764597
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 62.2%

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 3
Current: HK$13,347 HKD|Low: HK$4,256 HKD|High: HK$13,668 HKD|Avg: HK$7,349 HKD|-2.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4HK$4,256 HKD
Retailer 6HK$4,585 HKD
Retailer 2HK$5,079 HKD
Retailer 5HK$5,596 HKD
Retailer 3HK$9,820 HKD
NZ JewellersHK$13,347 HKD

28 data points across 6 retailers

6 retailersHK$4,256 HKD to HK$13,347 HKD

A
Cheapest Retailer
-
HK$4,256 HKD
A
Retailer 2
-
HK$4,585 HKD
View
A
Retailer 3
-
HK$5,079 HKD
View
B+
Retailer 4
-
HK$5,596 HKD
View
B
Retailer 5
-
HK$9,820 HKD
View
Most Expensive
B
NZ Jewellers
c3f34689-ff0b-44b5-8d2f-fa347761345c · Nov 3
HK$13,347 HKD
$1,703 USD
View
5 more retailers have this diamond
Prices start from HK$4,256 HKDSave up to HK$9,091 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$4,256 HKD