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Marquise|Natural|IGI

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 712558468

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 712558468

Diamond specifications and retailer prices

From $3,780 AUD
As of November 5, 2026
Save $4,221 AUD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,000 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 712558468. Listed at 15 retailers as of November 5, 2026, with prices from $3,780 to $8,000, a $4,221 spread on the same certified stone. NZ Jewellers lists it at $8,000. 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 angle41.8°
Pavilion angle39.1°
OriginNatural
Grading LabIGI
CertificateIGI 712558468
Dimensions10.73 × 5.29 × 3.40 mm
L/W Ratio2.03
Girdle conditionFaceted
Top View
10.73 mm5.29 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 712558468
Side View
Table 60.0%Crown 41.8°Girdle: THK-VTKPavilion 39.1°Culet: NoneDepth 64.3%

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 5
Current: $8,000 AUD|Low: $3,758 AUD|High: $8,000 AUD|Avg: $5,154 AUD
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
November 7, 2026
Retailer 10$3,780 AUD
Retailer 6$4,113 AUD
Retailer 13$4,119 AUD
Retailer 4$4,155 AUD
Retailer 3$4,305 AUD
Retailer 14$4,503 AUD
Retailer 7$4,592 AUD
Retailer 2$4,743 AUD
Retailer 15$4,768 AUD
Retailer 12$5,250 AUD
Retailer 5$5,299 AUD
Retailer 9$5,496 AUD
Retailer 8$6,797 AUD
Retailer 11$7,510 AUD
NZ Jewellers$8,000 AUD

13 data points across 15 retailers

15 retailers$3,780 AUD to $8,000 AUD

A
Cheapest Retailer
-
$3,780 AUD
B+
Retailer 2
-
$4,113 AUD
View
A
Retailer 3
-
$4,119 AUD
View
B+
Retailer 4
-
$4,155 AUD
View
Final sale: no returns
B+
Retailer 5
-
$4,305 AUD
View
Retailer 6
-
$4,503 AUD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$4,592 AUD
View
B+
Retailer 8
-
$4,743 AUD
View
B+
Retailer 9
-
$4,768 AUD
View
B+
Retailer 10
-
$5,250 AUD
View
B
Retailer 11
-
$5,299 AUD
View
B
Retailer 12
-
$5,496 AUD
View
B
Retailer 13
-
$6,797 AUD
View
B
Retailer 14
-
$7,510 AUD
View
Most Expensive
B
NZ Jewellers
7882e09e-f60e-485f-a5cf-6d3b55008840 · Nov 5
$8,000 AUD
$5,497 USD
View
14 more retailers have this diamond
Prices start from $3,780 AUDSave up to $4,221 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
$3,780 AUD