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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 $4,359 AUD
As of November 1, 2026
Save $5,849 AUD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $10,208 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 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 $4,359 to $10,208, a $5,849 spread on the same certified stone. NZ Jewellers lists it at $10,208. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $9,745 AUD|Low: $4,497 AUD|High: $9,916 AUD|Avg: $6,563 AUD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 6$4,919 AUD
Retailer 8$5,407 AUD
Retailer 3$5,683 AUD
Retailer 9$5,859 AUD
Retailer 2$6,046 AUD
Retailer 4$6,541 AUD
Retailer 7$6,880 AUD
Retailer 5$7,152 AUD
Retailer 1$9,745 AUD

40 data points across 9 retailers

20 retailers$4,359 AUD to $10,208 AUD

A
Cheapest Retailer
-
$4,359 AUD
B+
Retailer 2
-
$4,919 AUD
View
B+
Retailer 3
-
$5,094 AUD
View
B+
Retailer 4
-
$5,156 AUD
View
Retailer 5
-
$5,250 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$5,407 AUD
View
Final sale: no returns
B+
Retailer 7
-
$5,589 AUD
View
B+
Retailer 8
-
$5,683 AUD
View
B+
Retailer 9
-
$5,859 AUD
View
B+
Retailer 10
-
$5,859 AUD
View
Retailer 11
-
$5,859 AUD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
$5,906 AUD
View
B+
Retailer 13
-
$6,046 AUD
View
B+
Retailer 14
-
$6,073 AUD
View
B
Retailer 15
-
$6,541 AUD
View
B
Retailer 16
-
$6,760 AUD
View
B
Retailer 17
-
$7,152 AUD
View
B
Retailer 18
-
$8,613 AUD
View
B
Retailer 19
-
$9,745 AUD
View
Most Expensive
B
NZ Jewellers
07948e4e-9dd3-4c0a-9991-44929910dfc2 · Nov 5
$10,208 AUD
$7,014 USD
View
19 more retailers have this diamond
Prices start from $4,359 AUDSave up to $5,849 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
$4,359 AUD