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Marquise|Lab Grown|IGI

1.29ct D FL Marquise Lab Grown Diamond

ID • D/FL • IGI LG801689089

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG801689089

Diamond specifications and retailer prices

From £436 GBP
As of November 4, 2026
Save £1,179 GBP (73%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,885 GBP at Rare Carat · As of October 28, 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 LG801689089 or 801689089. Listed at 13 retailers as of November 4, 2026, with a 271% 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801689089
Dimensions11.07 × 5.70 × 3.62 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
11.07 mm5.70 mm1.29 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801689089
Side View
Table 58.0%Crown 37°Girdle: MED-THKPavilion 40.1°Culet: NoneDepth 63.5%

Caratlytics Score

How it works →
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: £1,885 GBP|Low: £436 GBP|High: £2,533 GBP|Avg: £1,199 GBP|-1.4%
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£436 GBP
Retailer 9£467 GBP
Retailer 5£537 GBP
Retailer 2£589 GBP
Retailer 3£619 GBP
Retailer 10£756 GBP
Retailer 13£768 GBP
Retailer 12£861 GBP
Retailer 11£1,178 GBP
Retailer 6£1,287 GBP
Retailer 4£1,564 GBP
Retailer 8£1,615 GBP
Rare Carat£1,885 GBP

42 data points across 13 retailers

13 retailers£436 GBP to £1,615 GBP

A
Cheapest Retailer
-
£436 GBP
A
Retailer 2
-
£467 GBP
View
A
Retailer 3
-
£537 GBP
View
A
Retailer 4
-
£589 GBP
View
A
Retailer 5
-
£619 GBP
View
A
Retailer 6
-
£756 GBP
View
A
Retailer 7
-
£768 GBP
View
B+
Retailer 8
-
£861 GBP
View
B+
Retailer 9
-
£1,178 GBP
View
B+
Retailer 10
-
£1,287 GBP
View
B
Retailer 11
-
£1,564 GBP
View
B
Retailer 12
-
£1,615 GBP
View
Most Expensive
Rare Carat
4033-U · Oct 28
£1,885 GBP
$2,545 USD
View
Price last confirmed 7 days ago
12 more retailers have this diamond
Prices start from £436 GBPSave up to £1,179 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
£436 GBP