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Marquise|Lab Grown|IGI

1.45ct D FL Marquise Lab Grown Diamond

ID • D/FL • IGI LG780666091

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780666091

Diamond specifications and retailer prices

From £251 GBP
As of November 4, 2026
Save £1,978 GBP (89%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,552 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.45ct lab-grown marquise diamond

This 1.45ct 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 LG780666091 or 780666091. Listed at 16 retailers as of November 4, 2026, with a 788% 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

1.45
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780666091
Dimensions11.25 × 6.00 × 3.69 mm
L/W Ratio1.88
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
11.25 mm6.00 mm1.45 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780666091
Side View
Table 60.0%Crown 34.2°Girdle: MED-STKPavilion 40°Culet: NoneDepth 61.5%

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: £2,552 GBP|Low: £251 GBP|High: £3,024 GBP|Avg: £1,204 GBP|+1.5%
Rare Carat
Retailer 2
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Retailer 7
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Retailer 10
Retailer 11
Retailer 12
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Retailer 17
November 1, 2026
Retailer 13£251 GBP
Retailer 5£291 GBP
Retailer 8£382 GBP
Retailer 14£432 GBP
Retailer 6£461 GBP
Retailer 17£502 GBP
Retailer 11£581 GBP
Retailer 7£646 GBP
Retailer 12£733 GBP
Retailer 15£912 GBP
Retailer 4£947 GBP
Retailer 3£1,104 GBP
Retailer 2£1,341 GBP
Retailer 10£2,043 GBP
Retailer 16£2,229 GBP
Rare Carat£2,552 GBP
Retailer 9£2,655 GBP

31 data points across 17 retailers

16 retailers£251 GBP to £2,229 GBP

A
Cheapest Retailer
-
£251 GBP
A
Retailer 2
-
£291 GBP
View
A
Retailer 3
-
£382 GBP
View
Final sale: no returns
A
Retailer 4
-
£432 GBP
View
A
Retailer 5
-
£461 GBP
View
A
Retailer 6
-
£502 GBP
View
Retailer 7
-
£581 GBP
View
Price last confirmed 7 days ago
A
Retailer 8
-
£646 GBP
View
A
Retailer 9
-
£733 GBP
View
B+
Retailer 10
-
£912 GBP
View
B+
Retailer 11
-
£947 GBP
View
B+
Retailer 12
-
£1,104 GBP
View
B+
Retailer 13
-
£1,341 GBP
View
B
Retailer 14
-
£2,043 GBP
View
B
Retailer 15
-
£2,229 GBP
View
Most Expensive
Rare Carat
P82T-34B · Oct 28
£2,552 GBP
$3,435 USD
View
Price last confirmed 8 days ago
15 more retailers have this diamond
Prices start from £251 GBPSave up to £1,978 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
1.45ct Marquise
£251 GBP