Marquise|Natural|IGI

0.51ct J SI1 Marquise Natural Diamond

VG • J/SI1 • IGI 754532759

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 754532759

Diamond specifications and retailer prices

From $530 USD
As of November 1, 2026
Save $1,133 USD (68%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,663 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 754532759. Listed at 11 retailers as of October 30, 2026, with prices from $530 to $1,663, a $1,133 spread on the same certified stone. NZ Jewellers lists it at $1,663. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
J
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle32.5°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 754532759
Dimensions8.22 × 4.13 × 2.61 mm
L/W Ratio1.99
Girdle conditionFaceted
Top View
8.22 mm4.13 mm0.51 ctJ / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 754532759
Side View
Table 60.0%Crown 32.5°Girdle: THN-VTKPavilion 41.5°Culet: NoneDepth 63.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $651 USD|Low: $571 USD|High: $1,240 USD|Avg: $757 USD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 7$571 USD
Retailer 8$590 USD
Retailer 6$605 USD
Retailer 1$651 USD
Retailer 2$691 USD
Retailer 3$792 USD
Retailer 4$818 USD
Retailer 5$1,231 USD

42 data points across 8 retailers

11 retailers$530 USD to $1,663 USD

B+
Cheapest Retailer
-
$530 USD
B+
Retailer 2
-
$571 USD
View
B+
Retailer 3
-
$571 USD
View
B+
Retailer 4
-
$605 USD
View
B+
Retailer 5
-
$612 USD
View
B+
Retailer 6
-
$651 USD
£512 GBP
View
B
Retailer 7
-
$691 USD
£544 GBP
View
B
Retailer 8
-
$792 USD
€754 EUR
View
B
Retailer 9
-
$818 USD
ZAR 13,219 ZAR
View
C
Retailer 10
-
$1,231 USD
£969 GBP
View
Most Expensive
C
NZ Jewellers
947aa185-d648-4229-a6f5-ea6f8c1825e0 · Oct 30
$1,663 USD
View
10 more retailers have this diamond
Prices start from $530 USDSave up to $1,133 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.

B+
0.51ct Marquise
$530 USD