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Marquise|Lab Grown|IGI

1.28ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG790611716

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790611716

Diamond specifications and retailer prices

From $567 USD
As of October 30, 2026
Save $2,863 USD (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $3,430 USD at Brilliant Earth · As of October 30, 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 LG790611716 or 790611716. Listed at 22 retailers as of October 30, 2026, with prices from $567 to $3,430, a $2,863 spread on the same certified stone. Brilliant Earth lists it at $3,430. 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 angle34.8°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790611716
Dimensions10.90 × 5.72 × 3.57 mm
L/W Ratio1.91
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
10.90 mm5.72 mm1.28 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790611716
Side View
Table 56.0%Crown 34.8°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 62.4%

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: Oct 30
Current: $3,430 USD|Low: $553 USD|High: $3,430 USD|Avg: $1,454 USD
Brilliant Earth
Retailer 2
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Retailer 22
October 30, 2026
Retailer 14$567 USD
Retailer 10$634 USD
Retailer 5$635 USD
Retailer 3$703 USD
Retailer 20$703 USD
Retailer 4$768 USD
Retailer 17$835 USD
Retailer 8$908 USD
Retailer 22$958 USD
Retailer 18$1,068 USD
Retailer 9$1,084 USD
Retailer 2$1,098 USD
Retailer 16$1,208 USD
Retailer 21$1,745 USD
Retailer 19$1,849 USD
Retailer 7$2,042 USD
Retailer 12$2,221 USD
Retailer 6$2,279 USD
Retailer 11$2,365 USD
Retailer 15$2,560 USD
Retailer 13$3,070 USD
Brilliant Earth$3,430 USD

40 data points across 22 retailers

22 retailers$567 USD to $3,430 USD

A
Cheapest Retailer
-
$567 USD
A
Retailer 2
-
$634 USD
View
Final sale: no returns
A
Retailer 3
-
$635 USD
View
Retailer 4
-
$703 USD
View
Price last confirmed 17 days ago
A
Retailer 5
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$703 USD
View
A
Retailer 6
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$768 USD
HK$6,000 HKD
View
A
Retailer 7
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$835 USD
View
A
Retailer 8
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$908 USD
View
A
Retailer 9
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$958 USD
View
A
Retailer 10
-
$1,068 USD
€1,017 EUR
View
A
Retailer 11
-
$1,084 USD
View
B+
Retailer 12
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$1,098 USD
£864 GBP
View
B+
Retailer 13
-
$1,208 USD
ZAR 19,522 ZAR
View
B+
Retailer 14
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$1,745 USD
View
B+
Retailer 15
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$1,849 USD
View
B+
Retailer 16
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$2,042 USD
£1,608 GBP
View
B
Retailer 17
-
$2,221 USD
SGD 3,002 SGD
View
B
Retailer 18
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$2,279 USD
View
B
Retailer 19
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$2,365 USD
View
Retailer 20
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$2,560 USD
View
Price last confirmed 26 days ago
B
Retailer 21
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$3,070 USD
£2,417 GBP
View
Most Expensive
B
Brilliant Earth
19960689A · Oct 30
$3,430 USD
View
21 more retailers have this diamond
Prices start from $567 USDSave up to $2,863 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
$567 USD