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Marquise|Lab Grown|IGI

1.20ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG799676768

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG799676768

Diamond specifications and retailer prices

From $740 AUD
As of November 4, 2026
Save $3,446 AUD (82%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,186 AUD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.2ct lab-grown marquise diamond

This 1.2ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG799676768 or 799676768. Listed at 23 retailers as of November 4, 2026, with prices from $740 to $4,186, a $3,446 spread on the same certified stone. Brilliant Earth lists it at $4,186. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG799676768
Dimensions11.25 × 5.53 × 3.39 mm
L/W Ratio2.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.25 mm5.53 mm1.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG799676768
Side View
Table 58.0%Crown 33.3°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 61.3%

Caratlytics Score

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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 4
Current: $4,186 AUD|Low: $740 AUD|High: $4,687 AUD|Avg: $2,002 AUD
Brilliant Earth
Retailer 2
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Retailer 22
November 6, 2026
Retailer 15$740 AUD
Retailer 6$829 AUD
Retailer 10$829 AUD
Retailer 5$919 AUD
Retailer 21$1,006 AUD
Retailer 19$1,114 AUD
Retailer 4$1,214 AUD
Retailer 9$1,214 AUD
Retailer 2$1,391 AUD
Retailer 13$1,404 AUD
Retailer 11$1,424 AUD
Retailer 18$1,583 AUD
Retailer 16$2,241 AUD
Retailer 20$2,250 AUD
Retailer 3$2,368 AUD
Retailer 22$2,414 AUD
Retailer 8$2,677 AUD
Retailer 14$2,907 AUD
Retailer 7$2,984 AUD
Retailer 12$3,156 AUD
Retailer 17$3,821 AUD
Brilliant Earth$4,186 AUD

41 data points across 22 retailers

23 retailers$740 AUD to $4,186 AUD

A
Cheapest Retailer
-
$740 AUD
A
Retailer 2
-
$829 AUD
View
Final sale: no returns
A
Retailer 3
-
$829 AUD
View
Retailer 4
-
$919 AUD
View
Price last confirmed 21 days ago
A
Retailer 5
-
$919 AUD
View
A
Retailer 6
-
$1,006 AUD
View
B+
Retailer 7
-
$1,114 AUD
View
B+
Retailer 8
-
$1,214 AUD
View
B+
Retailer 9
-
$1,214 AUD
View
B+
Retailer 10
-
$1,391 AUD
View
B+
Retailer 11
-
$1,404 AUD
View
B+
Retailer 12
-
$1,424 AUD
View
B+
Retailer 13
-
$1,583 AUD
View
B+
Retailer 14
-
$2,241 AUD
View
Retailer 15
-
$2,250 AUD
View
Price last confirmed 9 days ago
B
Retailer 16
-
$2,368 AUD
View
B+
Retailer 17
-
$2,414 AUD
View
B
Retailer 18
-
$2,677 AUD
View
B
Retailer 19
-
$2,907 AUD
View
B
Retailer 20
-
$2,984 AUD
View
B
Retailer 21
-
$3,156 AUD
View
B
Retailer 22
-
$3,821 AUD
View
Most Expensive
B
Brilliant Earth
19804118A · Nov 6
$4,186 AUD
$2,930 USD
View
22 more retailers have this diamond
Prices start from $740 AUDSave up to $3,446 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
$740 AUD