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Marquise|Natural|IGI

1.20ct G SI1 Marquise Natural Diamond

VG • G/SI1 • IGI 801638156

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 801638156

Diamond specifications and retailer prices

From $3,838 SGD
As of November 1, 2026
Save $5,151 SGD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $8,989 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 801638156. Listed at 20 retailers as of November 1, 2026, with prices from $3,838 to $8,989, a $5,151 spread on the same certified stone. NZ Jewellers lists it at $8,989. 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

1.20
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle34.8°
OriginNatural
Grading LabIGI
CertificateIGI 801638156
Dimensions11.22 × 5.69 × 3.07 mm
L/W Ratio1.97
Girdle conditionFaceted
Top View
11.22 mm5.69 mm1.20 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 801638156
Side View
Table 62.0%Crown 33.7°Girdle: STK-THKPavilion 34.8°Culet: NoneDepth 54.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $5,005 SGD|Low: $3,960 SGD|High: $8,732 SGD|Avg: $5,782 SGD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5$4,332 SGD
Retailer 8$4,761 SGD
Retailer 1$5,005 SGD
Retailer 9$5,160 SGD
Retailer 3$5,292 SGD
Retailer 2$5,760 SGD
Retailer 7$6,058 SGD
Retailer 4$6,298 SGD
Retailer 6$8,675 SGD

40 data points across 9 retailers

20 retailers$3,838 SGD to $8,989 SGD

A
Cheapest Retailer
-
$3,838 SGD
B+
Retailer 2
-
$4,332 SGD
View
B+
Retailer 3
-
$4,486 SGD
View
B+
Retailer 4
-
$4,541 SGD
View
Retailer 5
-
$4,623 SGD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$4,761 SGD
View
Final sale: no returns
B+
Retailer 7
-
$4,921 SGD
View
B+
Retailer 8
-
$5,005 SGD
View
B+
Retailer 9
-
$5,160 SGD
View
B+
Retailer 10
-
$5,160 SGD
View
Retailer 11
-
$5,160 SGD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$5,201 SGD
View
B+
Retailer 13
-
$5,292 SGD
View
B+
Retailer 14
-
$5,348 SGD
View
B
Retailer 15
-
$5,760 SGD
View
B
Retailer 16
-
$5,953 SGD
View
B
Retailer 17
-
$6,298 SGD
View
B
Retailer 18
-
$7,585 SGD
View
Retailer 19
-
$8,675 SGD
View
Price last confirmed 9 days ago
Most Expensive
B
NZ Jewellers
07948e4e-9dd3-4c0a-9991-44929910dfc2 · Nov 5
$8,989 SGD
$7,014 USD
View
19 more retailers have this diamond
Prices start from $3,838 SGDSave up to $5,151 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.

A
1.20ct Marquise
$3,838 SGD