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Radiant|Lab Grown|IGI

1.55ct F IF Radiant Lab Grown Diamond

ID • F/IF • IGI LG613346986

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG613346986

Diamond specifications and retailer prices

From £190 GBP
As of November 4, 2026
Save £1,667 GBP (90%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £1,857 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG613346986 or 613346986. Listed at 28 retailers as of November 4, 2026, with prices from £190 to £1,857, a £1,667 spread on the same certified stone. Brilliant Earth lists it at £1,857. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle27.9°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG613346986
Dimensions7.99 × 5.78 × 3.89 mm
L/W Ratio1.38
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
7.99 mm5.78 mm1.55 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG613346986
Side View
Table 64.0%Crown 27.9°Girdle: Slightly ThickPavilion 35.1°Culet: NoneDepth 67.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £1,857 GBP|Low: £190 GBP|High: £1,857 GBP|Avg: £643 GBP
Brilliant Earth
Retailer 2
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Retailer 11
Retailer 12
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Retailer 17
November 5, 2026
Retailer 17£190 GBP
Retailer 9£225 GBP
Retailer 5£351 GBP
Retailer 11£353 GBP
Retailer 3£368 GBP
Retailer 14£429 GBP
Retailer 6£432 GBP
Retailer 13£449 GBP
Retailer 2£455 GBP
Retailer 8£606 GBP
Retailer 12£610 GBP
Retailer 16£724 GBP
Retailer 4£927 GBP
Retailer 15£950 GBP
Retailer 7£1,028 GBP
Retailer 10£1,040 GBP
Brilliant Earth£1,857 GBP

45 data points across 17 retailers

28 retailers£190 GBP to £1,857 GBP

A
Cheapest Retailer
-
£190 GBP
Retailer 2
-
£190 GBP
View
Price last confirmed 28 days ago
Retailer 3
-
£190 GBP
View
Price last confirmed 36 days ago
Retailer 4
-
£221 GBP
View
Price last confirmed 39 days ago
A
Retailer 5
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£225 GBP
View
Final sale: no returns
Retailer 6
-
£233 GBP
View
Price last confirmed 37 days ago
Retailer 7
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£236 GBP
View
Price last confirmed 33 days ago
A
Retailer 8
-
£351 GBP
View
A
Retailer 9
-
£353 GBP
View
A
Retailer 10
-
£368 GBP
View
A
Retailer 11
-
£429 GBP
View
A
Retailer 12
-
£432 GBP
View
A
Retailer 13
-
£449 GBP
View
A
Retailer 14
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£455 GBP
View
A
Retailer 15
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£583 GBP
View
A
Retailer 16
-
£606 GBP
View
A
Retailer 17
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£610 GBP
View
B+
Retailer 18
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£724 GBP
View
Retailer 19
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£837 GBP
View
Price last confirmed 26 days ago
B+
Retailer 20
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£837 GBP
View
Retailer 21
-
£837 GBP
View
Price last confirmed 36 days ago
B+
Retailer 22
-
£927 GBP
View
B+
Retailer 23
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£950 GBP
View
B+
Retailer 24
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£960 GBP
View
B+
Retailer 25
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£1,028 GBP
View
B+
Retailer 26
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£1,040 GBP
View
B
Retailer 27
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£1,687 GBP
View
Most Expensive
B
Brilliant Earth
8924177Y · Nov 4
£1,857 GBP
$2,500 USD
View
27 more retailers have this diamond
Prices start from £190 GBPSave up to £1,667 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 Radiant
£190 GBP