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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6565280558

Certificate GIA 6565280558

Diamond specifications and retailer prices

From HK$3,973 HKD
₹48,225 INR
As of November 2, 2026
Save HK$8,714 HKD (69%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$18,494 HKD at MOH London · As of November 2, 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 H 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 6565280558. Listed at 14 retailers as of November 1, 2026, with a 219% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565280558
Dimensions8.57 × 3.89 × 2.49 mm
L/W Ratio2.20
Culet sizeNone
Top View
8.57 mm3.89 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6565280558
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 64.1%

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 2
Current: HK$18,494 HKD|Low: HK$3,970 HKD|High: HK$18,494 HKD|Avg: HK$7,181 HKD
MOH London
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
November 3, 2026
Retailer 7HK$3,973 HKD
Retailer 6HK$4,982 HKD
Retailer 5HK$7,167 HKD
Retailer 2HK$7,977 HKD
Retailer 4HK$8,269 HKD
Retailer 9HK$9,007 HKD
Retailer 14HK$9,313 HKD
Retailer 11HK$10,098 HKD
Retailer 13HK$10,631 HKD
Retailer 12HK$10,985 HKD
Retailer 3HK$11,651 HKD
Retailer 8HK$12,395 HKD
Retailer 10HK$12,687 HKD
MOH LondonHK$18,494 HKD

39 data points across 14 retailers

14 retailersHK$3,973 HKD to HK$12,687 HKD

A
Cheapest Retailer
-
HK$3,973 HKD
₹48,225 INR
A
Retailer 2
-
HK$4,982 HKD
$635 USD
View
B+
Retailer 3
-
HK$7,167 HKD
€870 EUR
View
B
Retailer 4
-
HK$7,977 HKD
£801 GBP
View
B
Retailer 5
-
HK$8,269 HKD
ZAR 17,026 ZAR
View
B
Retailer 6
-
HK$9,007 HKD
$1,148 USD
View
B
Retailer 7
-
HK$9,313 HKD
$1,187 USD
View
Final sale: no returns
B
Retailer 8
-
HK$10,098 HKD
$1,287 USD
View
B
Retailer 9
-
HK$10,631 HKD
$1,355 USD
View
B
Retailer 10
-
HK$10,985 HKD
$1,400 USD
View
B
Retailer 11
-
HK$11,651 HKD
$1,485 USD
View
B
Retailer 12
-
HK$12,395 HKD
£1,244 GBP
View
B
Retailer 13
-
HK$12,687 HKD
$1,617 USD
View
Most Expensive
MOH London
D5D7E2BD8 · Nov 2
HK$18,494 HKD
£1,856 GBP
View
Price under review
13 more retailers have this diamond
Prices start from HK$3,973 HKDSave up to HK$8,714 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$3,973 HKD