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Marquise|Lab Grown|IGI

1.45ct D FL Marquise Lab Grown Diamond

ID • D/FL • IGI LG801689149

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG801689149

Diamond specifications and retailer prices

From £428 GBP
As of November 4, 2026
Save £1,794 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,612 GBP at Rare Carat · As of October 7, 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 LG801689149 or 801689149. Listed at 14 retailers as of November 4, 2026, with a 419% 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 angle33.4°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801689149
Dimensions12.02 × 5.91 × 3.61 mm
L/W Ratio2.03
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
12.02 mm5.91 mm1.45 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801689149
Side View
Table 59.0%Crown 33.4°Girdle: MED-STKPavilion 40°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
A+
Exceptional
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: £2,612 GBP|Low: £428 GBP|High: £3,684 GBP|Avg: £1,699 GBP|-1.0%
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
Retailer 14
November 5, 2026
Retailer 9£428 GBP
Retailer 11£522 GBP
Retailer 7£600 GBP
Retailer 6£714 GBP
Retailer 2£826 GBP
Retailer 14£853 GBP
Retailer 5£859 GBP
Retailer 4£963 GBP
Retailer 13£1,073 GBP
Retailer 3£1,213 GBP
Retailer 8£1,438 GBP
Retailer 12£1,791 GBP
Retailer 10£2,222 GBP
Rare Carat£2,612 GBP

45 data points across 14 retailers

14 retailers£428 GBP to £2,222 GBP

A+
Cheapest Retailer
-
£428 GBP
A
Retailer 2
-
£522 GBP
View
A
Retailer 3
-
£600 GBP
View
A
Retailer 4
-
£714 GBP
View
A
Retailer 5
-
£826 GBP
View
A
Retailer 6
-
£853 GBP
View
Retailer 7
-
£859 GBP
View
Price last confirmed 7 days ago
B+
Retailer 8
-
£963 GBP
View
B+
Retailer 9
-
£1,073 GBP
View
B+
Retailer 10
-
£1,213 GBP
View
B+
Retailer 11
-
£1,438 GBP
View
B
Retailer 12
-
£1,791 GBP
View
B
Retailer 13
-
£2,222 GBP
View
Most Expensive
Rare Carat
4093-U · Oct 7
£2,612 GBP
$3,515 USD
View
Price last confirmed 28 days ago
13 more retailers have this diamond
Prices start from £428 GBPSave up to £1,794 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
£428 GBP