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Marquise|Lab Grown|IGI

1.30ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG790611713

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790611713

Diamond specifications and retailer prices

From £310 GBP
As of November 4, 2026
Save £1,504 GBP (83%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,815 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.3ct lab-grown marquise diamond

This 1.3ct 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 LG790611713 or 790611713. Listed at 22 retailers as of November 4, 2026, with prices from £310 to £1,815, a £1,504 spread on the same certified stone. Brilliant Earth lists it at £1,815. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.30
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790611713
Dimensions11.37 × 5.73 × 3.59 mm
L/W Ratio1.98
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
11.37 mm5.73 mm1.30 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790611713
Side View
Table 59.0%Crown 35.2°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.7%

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: £1,815 GBP|Low: £310 GBP|High: £2,882 GBP|Avg: £1,056 GBP|-37.0%
Brilliant Earth
Retailer 2
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November 5, 2026
Retailer 17£310 GBP
Retailer 9£347 GBP
Retailer 19£347 GBP
Retailer 4£384 GBP
Retailer 14£406 GBP
Retailer 8£427 GBP
Retailer 22£493 GBP
Retailer 3£556 GBP
Retailer 20£607 GBP
Retailer 2£627 GBP
Retailer 12£644 GBP
Retailer 18£663 GBP
Retailer 6£690 GBP
Retailer 16£1,079 GBP
Retailer 11£1,117 GBP
Retailer 10£1,223 GBP
Retailer 5£1,236 GBP
Retailer 7£1,261 GBP
Retailer 21£1,401 GBP
Retailer 13£1,408 GBP
Retailer 15£1,656 GBP
Brilliant Earth£1,815 GBP

34 data points across 22 retailers

22 retailers£310 GBP to £1,815 GBP

A
Cheapest Retailer
-
£310 GBP
A
Retailer 2
-
£347 GBP
View
Final sale: no returns
A
Retailer 3
-
£347 GBP
View
A
Retailer 4
-
£384 GBP
View
Retailer 5
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£406 GBP
View
Price last confirmed 11 days ago
A
Retailer 6
-
£427 GBP
View
A
Retailer 7
-
£493 GBP
View
A
Retailer 8
-
£556 GBP
View
A
Retailer 9
-
£607 GBP
View
A
Retailer 10
-
£627 GBP
View
Retailer 11
-
£644 GBP
View
Price last confirmed 9 days ago
A
Retailer 12
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£663 GBP
View
A
Retailer 13
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£690 GBP
View
B+
Retailer 14
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£1,079 GBP
View
B+
Retailer 15
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£1,117 GBP
View
B+
Retailer 16
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£1,223 GBP
View
B+
Retailer 17
-
£1,236 GBP
View
B+
Retailer 18
-
£1,261 GBP
View
B+
Retailer 19
-
£1,401 GBP
View
B
Retailer 20
-
£1,408 GBP
View
Retailer 21
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£1,656 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
19074344A · Nov 4
£1,815 GBP
$2,450 USD
View
21 more retailers have this diamond
Prices start from £310 GBPSave up to £1,504 GBP

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
1.30ct Marquise
£310 GBP