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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

EX • E/SI1 • GIA 6541370134

Certificate GIA 6541370134

Diamond specifications and retailer prices

From $1,521 NZD
$857 USD
As of October 31, 2026
Save $1,810 NZD (54%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,436 NZD at NZ Jewellers · As of October 30, 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 6541370134. Listed at 23 retailers as of October 31, 2026, with a 119% 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541370134
Dimensions8.12 × 4.15 × 2.57 mm
L/W Ratio1.96
Top View
8.12 mm4.15 mm0.51 ctE / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541370134
Side View
Table 63.0%CrownGirdle: MED-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 31
Current: $4,436 NZD|Low: $1,267 NZD|High: $4,436 NZD|Avg: $2,358 NZD
NZ Jewellers
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
Retailer 15
November 1, 2026
Retailer 13$1,521 NZD
Retailer 11$1,526 NZD
Retailer 4$1,648 NZD
Retailer 15$1,710 NZD
Retailer 3$1,856 NZD
Retailer 5$1,900 NZD
Retailer 12$1,925 NZD
Retailer 7$2,046 NZD
Retailer 8$2,133 NZD
Retailer 14$2,378 NZD
Retailer 9$2,554 NZD
Retailer 10$2,807 NZD
Retailer 6$2,946 NZD
Retailer 2$3,330 NZD
NZ Jewellers$4,436 NZD

46 data points across 15 retailers

23 retailers$1,521 NZD to $3,330 NZD

A
Cheapest Retailer
-
$1,521 NZD
$857 USD
Final sale: no returns
Retailer 2
-
$1,526 NZD
$860 USD
View
Price last confirmed 13 days ago
B+
Retailer 3
-
$1,629 NZD
$918 USD
View
B+
Retailer 4
-
$1,642 NZD
A$1,424 AUD
View
B+
Retailer 5
-
$1,648 NZD
$929 USD
View
B+
Retailer 6
-
$1,648 NZD
$929 USD
View
B+
Retailer 7
-
$1,664 NZD
$938 USD
View
B+
Retailer 8
-
$1,710 NZD
$964 USD
View
B+
Retailer 9
-
$1,856 NZD
$1,046 USD
View
B
Retailer 10
-
$1,900 NZD
$1,071 USD
View
B
Retailer 11
-
$1,925 NZD
$1,085 USD
View
B+
Retailer 12
-
$2,005 NZD
$1,130 USD
View
B+
Retailer 13
-
$2,005 NZD
$1,130 USD
View
B+
Retailer 14
-
$2,046 NZD
$1,153 USD
View
B+
Retailer 15
-
$2,076 NZD
$1,170 USD
View
B+
Retailer 16
-
$2,133 NZD
£946 GBP
View
Retailer 17
-
$2,378 NZD
A$2,062 AUD
View
Price last confirmed 28 days ago
B
Retailer 18
-
$2,394 NZD
$1,349 USD
View
B
Retailer 19
-
$2,554 NZD
€1,371 EUR
View
B
Retailer 20
-
$2,807 NZD
ZAR 25,560 ZAR
View
B
Retailer 21
-
$2,946 NZD
CA$2,306 CAD
View
B
Retailer 22
-
$3,330 NZD
£1,478 GBP
View
Most Expensive
NZ Jewellers
6fe8d8e1-b6e0-4a79-8df8-877dfdece077 · Oct 30
$4,436 NZD
$2,500 USD
View
Price under review
22 more retailers have this diamond
Prices start from $1,521 NZDSave up to $1,810 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
$1,521 NZD