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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 $455 USD
As of November 2, 2026
Save $1,477 USD (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,932 USD 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 $455 to $1,932, a $1,477 spread on the same certified stone. NZ Jewellers lists it at $1,932. 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
Color
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: $1,932 USD|Low: $455 USD|High: $1,932 USD|Avg: $719 USD|+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 10$455 USD
Retailer 12$493 USD
Retailer 11$510 USD
Retailer 4$543 USD
Retailer 6$543 USD
Retailer 5$548 USD
Retailer 7$569 USD
Retailer 13$569 USD
Retailer 14$575 USD
Retailer 8$605 USD
Retailer 9$616 USD
Retailer 3$680 USD
Retailer 2$1,139 USD
NZ Jewellers$1,932 USD

13 data points across 14 retailers

14 retailers$455 USD to $1,932 USD

A
Cheapest Retailer
-
$455 USD
Final sale: no returns
A
Retailer 2
-
$493 USD
View
A
Retailer 3
-
$510 USD
View
A
Retailer 4
-
$543 USD
View
A
Retailer 5
-
$543 USD
View
A
Retailer 6
-
$548 USD
SGD 740 SGD
View
A
Retailer 7
-
$569 USD
View
A
Retailer 8
-
$569 USD
View
A
Retailer 9
-
$575 USD
View
A
Retailer 10
-
$605 USD
£477 GBP
View
A
Retailer 11
-
$616 USD
£485 GBP
View
B+
Retailer 12
-
$680 USD
View
B
Retailer 13
-
$1,139 USD
£897 GBP
View
Most Expensive
C
NZ Jewellers
0b52d66a-7e99-4f9c-a014-51de6eea188d · Oct 30
$1,932 USD
View
13 more retailers have this diamond
Prices start from $455 USDSave up to $1,477 USD

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
$455 USD