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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5556998671

Certificate GIA 5556998671

Diamond specifications and retailer prices

From HK$4,318 HKD
As of November 1, 2026
Save HK$7,609 HKD (64%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$11,928 HKD at MOH London · As of October 29, 2026
View at MOH London

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 stated by the retailer rather than the lab and certified by GIA 5556998671. Listed at 11 retailers as of October 29, 2026, with prices from HK$4,318 to HK$11,928, a HK$7,609 spread on the same certified stone. MOH London lists it at HK$11,928. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5556998671
Dimensions7.90 × 4.12 × 2.61 mm
L/W Ratio1.92
Key to symbols
Twinning Wisp, Feather
Top View
7.90 mm4.12 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5556998671
Side View
Table 61.0%CrownGirdle: MD-ETKPavilionCulet: NoneDepth 63.4%

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 1
Current: HK$11,928 HKD|Low: HK$4,218 HKD|High: HK$12,406 HKD|Avg: HK$6,953 HKD|-2.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 7HK$4,318 HKD
Retailer 6HK$5,139 HKD
Retailer 8HK$5,218 HKD
Retailer 11HK$5,342 HKD
Retailer 9HK$6,104 HKD
Retailer 10HK$6,175 HKD
Retailer 2HK$6,333 HKD
Retailer 4HK$7,546 HKD
Retailer 5HK$7,933 HKD
Retailer 3HK$7,983 HKD
MOH LondonHK$11,928 HKD

42 data points across 11 retailers

11 retailersHK$4,318 HKD to HK$11,928 HKD

A
Cheapest Retailer
-
HK$4,318 HKD
A
Retailer 2
-
HK$5,139 HKD
$655 USD
View
Retailer 3
-
HK$5,218 HKD
$665 USD
View
Price last confirmed 14 days ago
B+
Retailer 4
-
HK$5,342 HKD
SGD 920 SGD
View
B+
Retailer 5
-
HK$6,104 HKD
$778 USD
View
B
Retailer 6
-
HK$6,175 HKD
$787 USD
View
B+
Retailer 7
-
HK$6,333 HKD
£636 GBP
View
B
Retailer 8
-
HK$7,546 HKD
€916 EUR
View
B
Retailer 9
-
HK$7,933 HKD
ZAR 16,334 ZAR
View
Retailer 10
-
HK$7,983 HKD
A$1,565 AUD
View
Price last confirmed 30 days ago
Most Expensive
B
MOH London
83146B0B4 · Oct 29
HK$11,928 HKD
£1,197 GBP
View
10 more retailers have this diamond
Prices start from HK$4,318 HKDSave up to HK$7,609 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$4,318 HKD