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Marquise|Lab Grown|IGI

1.29ct D FL Marquise Lab Grown Diamond

GD • D/FL • IGI LG787621251

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG787621251

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)
12 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 standard cut grade and certified by IGI LG787621251 or 787621251. Listed at 12 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. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.29
Carat
D
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG787621251
Dimensions11.09 × 5.61 × 3.61 mm
L/W Ratio1.98
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
11.09 mm5.61 mm1.29 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG787621251
Side View
Table 59.0%Crown 37.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 64.3%

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: £379 GBP|High: £2,563 GBP|Avg: £1,261 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
November 5, 2026
Retailer 6£379 GBP
Retailer 8£467 GBP
Retailer 2£589 GBP
Retailer 3£654 GBP
Retailer 4£713 GBP
Retailer 10£756 GBP
Retailer 12£768 GBP
Retailer 11£1,092 GBP
Retailer 9£1,270 GBP
Retailer 5£1,287 GBP
Retailer 7£1,800 GBP
Rare Carat£1,885 GBP

43 data points across 12 retailers

12 retailers£379 GBP to £1,800 GBP

A
Cheapest Retailer
-
£379 GBP
A
Retailer 2
-
£467 GBP
View
A
Retailer 3
-
£589 GBP
View
B+
Retailer 4
-
£654 GBP
View
B+
Retailer 5
-
£713 GBP
View
B+
Retailer 6
-
£756 GBP
View
B+
Retailer 7
-
£768 GBP
View
B+
Retailer 8
-
£1,092 GBP
View
B
Retailer 9
-
£1,270 GBP
View
B
Retailer 10
-
£1,287 GBP
View
B
Retailer 11
-
£1,800 GBP
View
Most Expensive
Rare Carat
116_l_787621251 · Oct 28
£1,885 GBP
$2,545 USD
View
Price last confirmed 7 days ago
11 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