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Marquise|Natural|IGI

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 835613875

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 835613875

Diamond specifications and retailer prices

From $3,746 AUD
As of November 6, 2026
Save $5,011 AUD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,757 AUD 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 835613875. Listed at 18 retailers as of November 5, 2026, with prices from $3,746 to $8,757, a $5,011 spread on the same certified stone. NZ Jewellers lists it at $8,757. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle36.8°
OriginNatural
Grading LabIGI
CertificateIGI 835613875
Dimensions10.43 × 5.51 × 3.46 mm
L/W Ratio1.89
Girdle conditionFaceted
Top View
10.43 mm5.51 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 835613875
Side View
Table 57.0%Crown 35.9°Girdle: STK-VTKPavilion 36.8°Culet: NoneDepth 62.8%

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 6
Current: $8,757 AUD|Low: $3,746 AUD|High: $8,853 AUD|Avg: $5,484 AUD|-1.1%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
November 7, 2026
Retailer 11$3,746 AUD
Retailer 6$4,461 AUD
Retailer 9$4,737 AUD
Retailer 4$4,810 AUD
Retailer 16$4,846 AUD
Retailer 12$4,876 AUD
Retailer 10$5,025 AUD
Retailer 18$5,025 AUD
Retailer 3$5,219 AUD
Retailer 17$5,237 AUD
Retailer 2$5,296 AUD
Retailer 5$5,319 AUD
Retailer 8$5,501 AUD
Retailer 13$5,509 AUD
Retailer 7$5,800 AUD
Retailer 14$6,135 AUD
Retailer 15$8,382 AUD
NZ Jewellers$8,757 AUD

20 data points across 18 retailers

18 retailers$3,746 AUD to $8,757 AUD

A
Cheapest Retailer
-
$3,746 AUD
B+
Retailer 2
-
$4,461 AUD
View
B+
Retailer 3
-
$4,737 AUD
View
B+
Retailer 4
-
$4,810 AUD
View
B+
Retailer 5
-
$4,846 AUD
View
B+
Retailer 6
-
$4,876 AUD
View
Retailer 7
-
$5,025 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$5,025 AUD
View
B+
Retailer 9
-
$5,219 AUD
View
B+
Retailer 10
-
$5,237 AUD
View
B+
Retailer 11
-
$5,296 AUD
View
B+
Retailer 12
-
$5,319 AUD
View
B+
Retailer 13
-
$5,501 AUD
View
B+
Retailer 14
-
$5,509 AUD
View
B
Retailer 15
-
$5,800 AUD
View
B
Retailer 16
-
$6,135 AUD
View
B
Retailer 17
-
$8,382 AUD
View
Most Expensive
B
NZ Jewellers
8768dbb9-f8f5-49af-beaf-a7d36c813bfe · Nov 5
$8,757 AUD
$6,017 USD
View
17 more retailers have this diamond
Prices start from $3,746 AUDSave up to $5,011 AUD

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
$3,746 AUD