CaratHunter
Plans
Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6565212812

Certificate GIA 6565212812

Diamond specifications and retailer prices

From $1,037 NZD
As of November 6, 2026
Save $3,143 NZD (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,747 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565212812. Listed at 15 retailers as of November 5, 2026, with a 303% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565212812
Dimensions8.68 × 4.06 × 2.46 mm
L/W Ratio2.14
Culet sizeNone
Top View
8.68 mm4.06 mm0.51 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6565212812
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 60.7%

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 6
Current: $4,747 NZD|Low: $1,037 NZD|High: $4,747 NZD|Avg: $2,006 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 6, 2026
Retailer 2$1,037 NZD
Retailer 6$1,299 NZD
Retailer 7$1,814 NZD
Retailer 8$1,916 NZD
Retailer 4$2,375 NZD
Retailer 10$2,501 NZD
Retailer 13$2,709 NZD
Retailer 3$2,757 NZD
Retailer 14$2,864 NZD
Retailer 5$3,126 NZD
Retailer 11$3,325 NZD
Retailer 12$3,334 NZD
Retailer 9$4,180 NZD
MOH London$4,747 NZD

39 data points across 14 retailers

15 retailers$1,037 NZD to $4,180 NZD

A
Cheapest Retailer
-
$1,037 NZD
A
Retailer 2
-
$1,263 NZD
View
Retailer 3
-
$1,299 NZD
View
Price last confirmed 18 days ago
B+
Retailer 4
-
$1,814 NZD
View
B+
Retailer 5
-
$1,916 NZD
View
B
Retailer 6
-
$2,375 NZD
View
B
Retailer 7
-
$2,501 NZD
View
Final sale: no returns
B
Retailer 8
-
$2,709 NZD
View
B
Retailer 9
-
$2,757 NZD
View
B
Retailer 10
-
$2,864 NZD
View
B
Retailer 11
-
$3,126 NZD
View
B
Retailer 12
-
$3,325 NZD
View
B
Retailer 13
-
$3,334 NZD
View
C
Retailer 14
-
$4,180 NZD
View
Most Expensive
MOH London
239CFF363 · Nov 2
$4,747 NZD
£2,101 GBP
View
Price under review
14 more retailers have this diamond
Prices start from $1,037 NZDSave up to $3,143 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
$1,037 NZD