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Marquise|Lab Grown|IGI

1.28ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG787621308

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787621308

Diamond specifications and retailer prices

From $716 USD
As of November 2, 2026
Save $2,114 USD (75%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,830 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 LG787621308 or 787621308. Listed at 14 retailers as of November 2, 2026, with prices from $716 to $2,830, a $2,114 spread on the same certified stone. Brilliant Earth lists it at $2,830. 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 angle34.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787621308
Dimensions11.18 × 5.70 × 3.58 mm
L/W Ratio1.96
Girdle conditionFaceted
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
11.18 mm5.70 mm1.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787621308
Side View
Table 60.0%Crown 34.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

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 2
Current: $2,830 USD|Low: $716 USD|High: $3,390 USD|Avg: $1,583 USD|-16.5%
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
November 2, 2026
Retailer 3$716 USD
Retailer 12$831 USD
Retailer 11$845 USD
Retailer 4$945 USD
Retailer 9$1,028 USD
Retailer 7$1,035 USD
Retailer 2$1,155 USD
Retailer 6$1,195 USD
Retailer 14$1,577 USD
Retailer 13$2,093 USD
Retailer 5$2,291 USD
Retailer 10$2,525 USD
Retailer 8$2,795 USD
Brilliant Earth$2,830 USD

42 data points across 14 retailers

14 retailers$716 USD to $2,830 USD

A
Cheapest Retailer
-
$716 USD
A
Retailer 2
-
$831 USD
View
A
Retailer 3
-
$845 USD
HK$6,600 HKD
View
B+
Retailer 4
-
$945 USD
View
A
Retailer 5
-
$1,028 USD
€979 EUR
View
A
Retailer 6
-
$1,035 USD
£815 GBP
View
B+
Retailer 7
-
$1,155 USD
ZAR 18,661 ZAR
View
B+
Retailer 8
-
$1,195 USD
A$1,838 AUD
View
Retailer 9
-
$1,577 USD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$2,093 USD
View
B
Retailer 11
-
$2,291 USD
View
B
Retailer 12
-
$2,525 USD
View
B
Retailer 13
-
$2,795 USD
£2,201 GBP
View
Most Expensive
B
Brilliant Earth
20870080Y · Nov 2
$2,830 USD
View
13 more retailers have this diamond
Prices start from $716 USDSave up to $2,114 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
$716 USD