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Marquise|Lab Grown|IGI

1.28ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG771640286

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG771640286

Diamond specifications and retailer prices

From $430 USD
As of November 1, 2026
Save $2,330 USD (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $2,760 USD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.28ct lab-grown marquise diamond

This 1.28ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG771640286 or 771640286. Listed at 21 retailers as of November 1, 2026, with prices from $430 to $2,760, a $2,330 spread on the same certified stone. Brilliant Earth lists it at $2,760. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
D
Color
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771640286
Dimensions11.35 × 5.77 × 3.53 mm
L/W Ratio1.97
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
11.35 mm5.77 mm1.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771640286
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.2%

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 1
Current: $2,760 USD|Low: $430 USD|High: $3,030 USD|Avg: $1,234 USD|-8.9%
Brilliant Earth
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
November 3, 2026
Retailer 3$430 USD
Retailer 7$481 USD
Retailer 12$652 USD
Retailer 5$660 USD
Retailer 14$712 USD
Retailer 6$782 USD
Retailer 4$792 USD
Retailer 10$823 USD
Retailer 11$864 USD
Retailer 15$895 USD
Retailer 9$1,149 USD
Retailer 16$1,572 USD
Retailer 13$1,784 USD
Retailer 2$1,862 USD
Retailer 8$2,555 USD
Brilliant Earth$2,760 USD

31 data points across 16 retailers

21 retailers$430 USD to $2,760 USD

Retailer 1
-
$369 USD
Price last confirmed 31 days ago
Retailer 2
-
$430 USD
View
Price last confirmed 35 days ago
A
Retailer 3
-
$430 USD
View
Final sale: no returns
Retailer 4
-
$476 USD
View
Price last confirmed 30 days ago
Retailer 5
-
$481 USD
View
Price last confirmed 8 days ago
Retailer 6
-
$485 USD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$652 USD
View
A
Retailer 8
-
$660 USD
View
A
Retailer 9
-
$712 USD
View
A
Retailer 10
-
$782 USD
€745 EUR
View
A
Retailer 11
-
$792 USD
A$1,218 AUD
View
A
Retailer 12
-
$823 USD
ZAR 13,296 ZAR
View
A
Retailer 13
-
$864 USD
£681 GBP
View
A
Retailer 14
-
$895 USD
View
B+
Retailer 15
-
$1,149 USD
View
Retailer 16
-
$1,531 USD
View
Price last confirmed 29 days ago
B+
Retailer 17
-
$1,572 USD
View
B+
Retailer 18
-
$1,784 USD
View
B+
Retailer 19
-
$1,862 USD
£1,466 GBP
View
Retailer 20
-
$2,555 USD
View
Price last confirmed 26 days ago
Most Expensive
B
Brilliant Earth
21212659A · Nov 2
$2,760 USD
View
20 more retailers have this diamond
Prices start from $430 USDSave up to $2,330 USD

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
1.28ct Marquise
$430 USD