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Marquise|Natural|IGI

0.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • IGI 649481398

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 649481398

Diamond specifications and retailer prices

From $516 SGD
As of November 5, 2026
Save $1,464 SGD (74%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,980 SGD at NZ Jewellers · As of November 5, 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 SI2 clarity (slightly-included), with a standard cut grade and certified by IGI 649481398. Listed at 13 retailers as of November 5, 2026, with prices from $516 to $1,980, a $1,464 spread on the same certified stone. NZ Jewellers lists it at $1,980. 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
I
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.2°
Pavilion angle36.7°
OriginNatural
Grading LabIGI
CertificateIGI 649481398
Dimensions9.00 × 4.02 × 2.32 mm
L/W Ratio2.24
Girdle conditionFaceted
Culet sizePointed
Top View
9.00 mm4.02 mm0.51 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 649481398
Side View
Table 64.0%Crown 38.2°Girdle: STK-VTKPavilion 36.7°Culet: NoneDepth 57.7%

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 5
Current: $1,980 SGD|Low: $516 SGD|High: $1,980 SGD|Avg: $787 SGD
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 6, 2026
Retailer 3$516 SGD
Retailer 9$538 SGD
Retailer 4$556 SGD
Retailer 10$556 SGD
Retailer 12$564 SGD
Retailer 14$596 SGD
Retailer 2$613 SGD
Retailer 5$683 SGD
Retailer 11$716 SGD
Retailer 13$722 SGD
Retailer 6$775 SGD
Retailer 7$929 SGD
Retailer 8$1,191 SGD
NZ Jewellers$1,980 SGD

41 data points across 14 retailers

13 retailers$516 SGD to $1,980 SGD

Retailer 1
-
$516 SGD
Price last confirmed 54 days ago
B+
Retailer 2
-
$516 SGD
View
B+
Retailer 3
-
$538 SGD
View
Retailer 4
-
$556 SGD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
$556 SGD
View
B+
Retailer 6
-
$596 SGD
View
B+
Retailer 7
-
$613 SGD
View
B+
Retailer 8
-
$683 SGD
View
B+
Retailer 9
-
$716 SGD
View
B+
Retailer 10
-
$722 SGD
View
B
Retailer 11
-
$929 SGD
View
B
Retailer 12
-
$1,191 SGD
View
Most Expensive
C
NZ Jewellers
dc731d7a-b765-4572-94a9-9777cff5c7f0 · Nov 5
$1,980 SGD
$1,545 USD
View
12 more retailers have this diamond
Prices start from $516 SGDSave up to $1,464 SGD

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
$516 SGD