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Marquise|Lab Grown|IGI

1.20ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754594815

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754594815

Diamond specifications and retailer prices

From $539 AUD
As of November 4, 2026
Save $2,347 AUD (81%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $2,886 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 LG754594815 or 754594815. Listed at 30 retailers as of November 4, 2026, with prices from $539 to $2,886, a $2,347 spread on the same certified stone. Brilliant Earth lists it at $2,886. 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 angle36°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754594815
Dimensions11.03 × 5.46 × 3.45 mm
L/W Ratio2.02
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
11.03 mm5.46 mm1.20 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754594815
Side View
Table 58.0%Crown 36°Girdle: STK-THKPavilion 40°Culet: NoneDepth 63.2%

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: $2,886 AUD|Low: $539 AUD|High: $3,700 AUD|Avg: $1,754 AUD|-22.0%
Brilliant Earth
Retailer 2
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Retailer 23
November 6, 2026
Retailer 22$539 AUD
Retailer 16$651 AUD
Retailer 20$694 AUD
Retailer 15$779 AUD
Retailer 19$779 AUD
Retailer 4$843 AUD
Retailer 2$966 AUD
Retailer 17$1,051 AUD
Retailer 14$1,101 AUD
Retailer 13$1,126 AUD
Retailer 10$1,341 AUD
Retailer 8$1,357 AUD
Retailer 21$1,464 AUD
Retailer 3$1,748 AUD
Retailer 23$1,916 AUD
Retailer 9$1,977 AUD
Retailer 6$2,001 AUD
Retailer 12$2,178 AUD
Retailer 7$2,277 AUD
Retailer 5$2,327 AUD
Retailer 18$2,381 AUD
Retailer 11$2,553 AUD
Brilliant Earth$2,886 AUD

30 data points across 23 retailers

30 retailers$539 AUD to $2,886 AUD

A
Cheapest Retailer
-
$539 AUD
Final sale: no returns
Retailer 2
-
$651 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$651 AUD
View
Price last confirmed 37 days ago
A
Retailer 4
-
$694 AUD
View
Retailer 5
-
$730 AUD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$779 AUD
View
Retailer 7
-
$779 AUD
View
Price last confirmed 29 days ago
Retailer 8
-
$779 AUD
View
Price last confirmed 27 days ago
Retailer 9
-
$799 AUD
View
Price last confirmed 38 days ago
A
Retailer 10
-
$843 AUD
View
A
Retailer 11
-
$966 AUD
View
A
Retailer 12
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$1,051 AUD
View
B+
Retailer 13
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$1,101 AUD
View
B+
Retailer 14
-
$1,126 AUD
View
Retailer 15
-
$1,276 AUD
View
Price last confirmed 22 days ago
B+
Retailer 16
-
$1,341 AUD
View
B+
Retailer 17
-
$1,357 AUD
View
B+
Retailer 18
-
$1,464 AUD
View
B+
Retailer 19
-
$1,748 AUD
View
B+
Retailer 20
-
$1,916 AUD
View
B+
Retailer 21
-
$1,977 AUD
View
B+
Retailer 22
-
$2,001 AUD
View
Retailer 23
-
$2,178 AUD
View
Price last confirmed 9 days ago
B
Retailer 24
-
$2,277 AUD
View
B
Retailer 25
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$2,327 AUD
View
B
Retailer 26
-
$2,381 AUD
View
Retailer 27
-
$2,501 AUD
View
Price last confirmed 27 days ago
B
Retailer 28
-
$2,553 AUD
View
Retailer 29
-
$2,598 AUD
View
Price last confirmed 37 days ago
Most Expensive
B
Brilliant Earth
17981286A · Nov 6
$2,886 AUD
$2,020 USD
View
29 more retailers have this diamond
Prices start from $539 AUDSave up to $2,347 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
$539 AUD