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Marquise|Natural|GIA

0.51ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 6562612974

Certificate GIA 6562612974

Diamond specifications and retailer prices

From $809 NZD
$455 USD
As of November 2, 2026
Save $2,625 NZD (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,434 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 I 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 6562612974. Listed at 14 retailers as of October 30, 2026, with prices from $809 to $3,434, a $2,625 spread on the same certified stone. NZ Jewellers lists it at $3,434. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6562612974
Dimensions8.00 × 4.23 × 2.67 mm
L/W Ratio1.89
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal
Top View
8.00 mm4.23 mm0.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6562612974
Side View
Table 57.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.0%

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: $3,434 NZD|Low: $809 NZD|High: $3,434 NZD|Avg: $1,277 NZD|+19.7%
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
November 2, 2026
Retailer 11$809 NZD
Retailer 13$876 NZD
Retailer 12$906 NZD
Retailer 2$944 NZD
Retailer 6$965 NZD
Retailer 5$973 NZD
Retailer 8$1,011 NZD
Retailer 14$1,011 NZD
Retailer 3$1,022 NZD
Retailer 9$1,076 NZD
Retailer 10$1,096 NZD
Retailer 4$1,209 NZD
Retailer 7$2,025 NZD
NZ Jewellers$3,434 NZD

13 data points across 14 retailers

14 retailers$809 NZD to $3,434 NZD

A
Cheapest Retailer
-
$809 NZD
$455 USD
Final sale: no returns
A
Retailer 2
-
$876 NZD
$493 USD
View
A
Retailer 3
-
$906 NZD
$510 USD
View
A
Retailer 4
-
$944 NZD
$531 USD
View
A
Retailer 5
-
$965 NZD
$543 USD
View
A
Retailer 6
-
$973 NZD
SGD 740 SGD
View
A
Retailer 7
-
$1,011 NZD
$569 USD
View
A
Retailer 8
-
$1,011 NZD
$569 USD
View
A
Retailer 9
-
$1,022 NZD
$575 USD
View
A
Retailer 10
-
$1,076 NZD
£477 GBP
View
A
Retailer 11
-
$1,096 NZD
£485 GBP
View
B+
Retailer 12
-
$1,209 NZD
$680 USD
View
B
Retailer 13
-
$2,025 NZD
£897 GBP
View
Most Expensive
C
NZ Jewellers
0b52d66a-7e99-4f9c-a014-51de6eea188d · Oct 30
$3,434 NZD
$1,932 USD
View
13 more retailers have this diamond
Prices start from $809 NZDSave up to $2,625 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
$809 NZD