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Marquise|Lab Grown|IGI

1.29ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG787620991

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787620991

Diamond specifications and retailer prices

From £379 GBP
As of November 4, 2026
Save £1,421 GBP (79%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,900 GBP at Rare Carat · As of October 21, 2026
View at Rare Carat

About this 1.29ct lab-grown marquise diamond

This 1.29ct 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 LG787620991 or 787620991. Listed at 13 retailers as of November 4, 2026, with a 375% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.29
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787620991
Dimensions11.03 × 5.69 × 3.63 mm
L/W Ratio1.94
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
11.03 mm5.69 mm1.29 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787620991
Side View
Table 57.0%Crown 36.2°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 63.8%

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 4
Current: £1,900 GBP|Low: £379 GBP|High: £2,563 GBP|Avg: £1,207 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 5, 2026
Retailer 7£379 GBP
Retailer 9£467 GBP
Retailer 2£589 GBP
Retailer 4£654 GBP
Retailer 5£713 GBP
Retailer 11£756 GBP
Retailer 3£768 GBP
Retailer 13£861 GBP
Retailer 12£1,092 GBP
Retailer 10£1,270 GBP
Retailer 6£1,287 GBP
Retailer 8£1,800 GBP
Rare Carat£1,900 GBP

42 data points across 13 retailers

13 retailers£379 GBP to £1,800 GBP

A
Cheapest Retailer
-
£379 GBP
A
Retailer 2
-
£467 GBP
View
A
Retailer 3
-
£589 GBP
View
A
Retailer 4
-
£654 GBP
View
B+
Retailer 5
-
£713 GBP
View
B+
Retailer 6
-
£756 GBP
View
A
Retailer 7
-
£768 GBP
View
B+
Retailer 8
-
£861 GBP
View
B+
Retailer 9
-
£1,092 GBP
View
B+
Retailer 10
-
£1,270 GBP
View
B+
Retailer 11
-
£1,287 GBP
View
B
Retailer 12
-
£1,800 GBP
View
Most Expensive
Rare Carat
54601 · Oct 21
£1,900 GBP
$2,565 USD
View
Price last confirmed 14 days ago
12 more retailers have this diamond
Prices start from £379 GBPSave up to £1,421 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
1.29ct Marquise
£379 GBP