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Marquise|Lab Grown|IGI

1.55ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG790611669

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790611669

Diamond specifications and retailer prices

From £689 GBP
As of November 4, 2026
Save £2,451 GBP (78%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £6,122 GBP at Do Amore Diamonds · As of November 4, 2026
View at Do Amore Diamonds

About this 1.55ct lab-grown marquise diamond

This 1.55ct lab-grown marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG790611669 or 790611669. Listed at 22 retailers as of November 4, 2026, with a 355% 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

1.55
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790611669
Dimensions11.57 × 6.09 × 3.86 mm
L/W Ratio1.90
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
11.57 mm6.09 mm1.55 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790611669
Side View
Table 58.0%Crown 36.7°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 63.4%

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: £6,122 GBP|Low: £689 GBP|High: £6,122 GBP|Avg: £1,796 GBP
Do Amore Diamonds
Retailer 2
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Retailer 22
November 5, 2026
Retailer 10£689 GBP
Retailer 8£713 GBP
Retailer 19£750 GBP
Retailer 11£772 GBP
Retailer 9£799 GBP
Retailer 21£799 GBP
Retailer 20£929 GBP
Retailer 22£956 GBP
Retailer 4£1,074 GBP
Retailer 2£1,260 GBP
Retailer 3£1,281 GBP
Retailer 13£1,623 GBP
Retailer 14£1,655 GBP
Retailer 18£1,779 GBP
Retailer 15£2,434 GBP
Retailer 7£2,501 GBP
Retailer 5£2,588 GBP
Retailer 17£2,734 GBP
Retailer 16£2,994 GBP
Retailer 12£3,111 GBP
Retailer 6£3,141 GBP
Do Amore Diamonds£6,122 GBP

45 data points across 22 retailers

22 retailers£689 GBP to £3,141 GBP

A
Cheapest Retailer
-
£689 GBP
A
Retailer 2
-
£713 GBP
View
A
Retailer 3
-
£750 GBP
View
A
Retailer 4
-
£772 GBP
View
Final sale: no returns
Retailer 5
-
£799 GBP
View
Price last confirmed 19 days ago
A
Retailer 6
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£799 GBP
View
A
Retailer 7
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£929 GBP
View
A
Retailer 8
-
£956 GBP
View
A
Retailer 9
-
£1,074 GBP
View
A
Retailer 10
-
£1,260 GBP
View
A
Retailer 11
-
£1,281 GBP
View
B+
Retailer 12
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£1,623 GBP
View
B+
Retailer 13
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£1,655 GBP
View
B+
Retailer 14
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£1,779 GBP
View
B
Retailer 15
-
£2,434 GBP
View
B+
Retailer 16
-
£2,501 GBP
View
B
Retailer 17
-
£2,588 GBP
View
B
Retailer 18
-
£2,734 GBP
View
B
Retailer 19
-
£2,994 GBP
View
B
Retailer 20
-
£3,111 GBP
View
B
Retailer 21
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£3,141 GBP
View
Most Expensive
Do Amore Diamonds
27-B7711CEBB · Nov 4
£6,122 GBP
$8,240 USD
View
Price under review
21 more retailers have this diamond
Prices start from £689 GBPSave up to £2,451 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
1.55ct Marquise
£689 GBP