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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 $900 NZD
₹48,225 INR
As of November 2, 2026
Save $1,974 NZD (69%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,189 NZD 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: $4,189 NZD|Low: $899 NZD|High: $4,189 NZD|Avg: $1,584 NZD
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 2, 2026
Retailer 2$900 NZD
Retailer 6$1,129 NZD
Retailer 5$1,624 NZD
Retailer 4$1,873 NZD
Retailer 9$2,040 NZD
Retailer 14$2,110 NZD
Retailer 11$2,287 NZD
Retailer 13$2,408 NZD
Retailer 12$2,488 NZD
Retailer 8$2,590 NZD
Retailer 3$2,639 NZD
Retailer 7$2,808 NZD
Retailer 10$2,874 NZD
MOH London$4,189 NZD

38 data points across 14 retailers

14 retailers$900 NZD to $2,874 NZD

A
Cheapest Retailer
-
$900 NZD
₹48,225 INR
A
Retailer 2
-
$1,129 NZD
$635 USD
View
B+
Retailer 3
-
$1,624 NZD
€870 EUR
View
B
Retailer 4
-
$1,873 NZD
ZAR 17,026 ZAR
View
B
Retailer 5
-
$2,040 NZD
$1,148 USD
View
B
Retailer 6
-
$2,110 NZD
$1,187 USD
View
Final sale: no returns
B
Retailer 7
-
$2,287 NZD
$1,287 USD
View
B
Retailer 8
-
$2,408 NZD
$1,355 USD
View
B
Retailer 9
-
$2,488 NZD
$1,400 USD
View
B
Retailer 10
-
$2,590 NZD
£1,148 GBP
View
B
Retailer 11
-
$2,639 NZD
$1,485 USD
View
B
Retailer 12
-
$2,808 NZD
£1,244 GBP
View
B
Retailer 13
-
$2,874 NZD
$1,617 USD
View
Most Expensive
MOH London
D5D7E2BD8 · Nov 2
$4,189 NZD
£1,856 GBP
View
Price under review
13 more retailers have this diamond
Prices start from $900 NZDSave up to $1,974 NZD

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
$900 NZD