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Round|Lab Grown|IGI

1.55ct F VS2 Round Lab Grown Diamond

ID • F/VS2 • IGI LG778647140

Shape and cutting style on the report: Round brilliant

Certificate IGI LG778647140

Diamond specifications and retailer prices

From £166 GBP
As of November 3, 2026
Save £773 GBP (82%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £978 GBP at Brilliant Earth · As of October 16, 2026
View at Brilliant Earth

About this 1.55ct lab-grown round diamond

This 1.55ct lab-grown round sits in the one-and-a-half to two carat band, graded F colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG778647140 or 778647140. Listed at 24 retailers as of November 3, 2026, with a 466% 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
F
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778647140
Dimensions7.48 × 7.51 × 4.50 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.48 mm7.51 mm1.55 ctF / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778647140
Side View
Table 58.0%Crown 32.9°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.1%

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 3
Current: £978 GBP|Low: £164 GBP|High: £978 GBP|Avg: £471 GBP
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
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Retailer 20
November 5, 2026
Retailer 11£166 GBP
Retailer 15£184 GBP
Retailer 20£192 GBP
Retailer 6£205 GBP
Retailer 7£205 GBP
Retailer 13£319 GBP
Retailer 8£350 GBP
Retailer 4£352 GBP
Retailer 2£378 GBP
Retailer 16£387 GBP
Retailer 5£394 GBP
Retailer 3£427 GBP
Retailer 12£660 GBP
Retailer 14£662 GBP
Retailer 19£688 GBP
Retailer 10£699 GBP
Retailer 17£823 GBP
Retailer 18£836 GBP
Retailer 9£939 GBP
Brilliant Earth£978 GBP

32 data points across 20 retailers

24 retailers£166 GBP to £939 GBP

A
Cheapest Retailer
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£166 GBP
A
Retailer 2
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£184 GBP
View
Final sale: no returns
A
Retailer 3
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£192 GBP
View
A
Retailer 4
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£205 GBP
View
Retailer 5
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£205 GBP
View
Price last confirmed 11 days ago
A
Retailer 6
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£319 GBP
View
A
Retailer 7
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£350 GBP
View
A
Retailer 8
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£352 GBP
View
A
Retailer 9
-
£378 GBP
View
A
Retailer 10
-
£387 GBP
View
A
Retailer 11
-
£394 GBP
View
B+
Retailer 12
-
£427 GBP
View
B+
Retailer 13
-
£568 GBP
View
Retailer 14
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£591 GBP
View
Price last confirmed 94 days ago
Retailer 15
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£654 GBP
View
Price last confirmed 45 days ago
B
Retailer 16
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£660 GBP
View
B
Retailer 17
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£662 GBP
View
Retailer 18
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£688 GBP
View
Price last confirmed 7 days ago
B
Retailer 19
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£699 GBP
View
B
Retailer 20
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£773 GBP
View
B
Retailer 21
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£823 GBP
View
B
Retailer 22
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£836 GBP
View
B
Retailer 23
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£939 GBP
View
Most Expensive
Brilliant Earth
20258678A · Oct 16
£978 GBP
$1,320 USD
View
Price last confirmed 19 days ago
23 more retailers have this diamond
Prices start from £166 GBPSave up to £773 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 Round
£166 GBP