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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

ID • E/SI1 • GIA 6552812953

Certificate GIA 6552812953

Diamond specifications and retailer prices

From $1,045 NZD
HK$4,600 HKD
As of October 30, 2026
Save $1,486 NZD (59%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $4,310 NZD at NZ Jewellers · As of October 17, 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 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 6552812953. Listed at 17 retailers as of October 29, 2026, with a 142% 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552812953
Dimensions7.83 × 4.28 × 2.64 mm
L/W Ratio1.83
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.83 mm4.28 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552812953
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.8%

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: Oct 30
Current: $1,418 NZD|Low: $983 NZD|High: $2,549 NZD|Avg: $1,551 NZD|+14.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8$1,045 NZD
Retailer 2$1,046 NZD
Retailer 6$1,267 NZD
Retailer 1$1,418 NZD
Retailer 3$1,651 NZD
Retailer 5$1,677 NZD
Retailer 7$2,067 NZD
Retailer 4$2,531 NZD

43 data points across 8 retailers

17 retailers$1,045 NZD to $2,531 NZD

A
Cheapest Retailer
-
$1,045 NZD
HK$4,600 HKD
A
Retailer 2
-
$1,046 NZD
₹56,140 INR
View
A
Retailer 3
-
$1,267 NZD
$714 USD
View
Final sale: no returns
Retailer 4
-
$1,375 NZD
$775 USD
View
Price last confirmed 15 days ago
Retailer 5
-
$1,375 NZD
$775 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
$1,395 NZD
$786 USD
View
A
Retailer 7
-
$1,418 NZD
$799 USD
View
Retailer 8
-
$1,427 NZD
$804 USD
View
Price last confirmed 14 days ago
A
Retailer 9
-
$1,453 NZD
SGD 1,107 SGD
View
Retailer 10
-
$1,586 NZD
$894 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
$1,609 NZD
$907 USD
View
B+
Retailer 12
-
$1,651 NZD
£733 GBP
View
B+
Retailer 13
-
$1,677 NZD
$945 USD
View
B+
Retailer 14
-
$1,863 NZD
$1,050 USD
View
Retailer 15
-
$2,067 NZD
A$1,792 AUD
View
Price last confirmed 27 days ago
B
Retailer 16
-
$2,531 NZD
£1,123 GBP
View
Most Expensive
NZ Jewellers
ba939c1f-2809-4921-8d8e-37c312bb936f · Oct 17
$4,310 NZD
$2,429 USD
View
Price last confirmed 13 days ago
16 more retailers have this diamond
Prices start from $1,045 NZDSave up to $1,486 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
$1,045 NZD