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Radiant|Lab Grown|IGI

1.55ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG512214411

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

Certificate IGI LG512214411

Diamond specifications and retailer prices

From £197 GBP
As of November 6, 2026
Save £1,491 GBP (88%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,688 GBP at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512214411 or 512214411. Listed at 15 retailers as of November 6, 2026, with prices from £197 to £1,688, a £1,491 spread on the same certified stone. Do Amore Diamonds lists it at £1,688. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.2°
Pavilion angle34.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512214411
Dimensions8.33 × 5.78 × 3.77 mm
L/W Ratio1.44
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
8.33 mm5.78 mm1.55 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512214411
Side View
Table 61.5%Crown 42.2°Girdle: Slightly ThickPavilion 34.6°Culet: NoneDepth 65.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £459 GBP|Low: £197 GBP|High: £1,255 GBP|Avg: £569 GBP|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 8£197 GBP
Retailer 9£287 GBP
Retailer 6£294 GBP
Retailer 1£459 GBP
Retailer 3£538 GBP
Retailer 7£722 GBP
Retailer 2£962 GBP
Retailer 4£1,029 GBP
Retailer 5£1,255 GBP

42 data points across 9 retailers

15 retailers£197 GBP to £1,688 GBP

Retailer 1
-
£169 GBP
Price last confirmed 36 days ago
A
Retailer 2
-
£197 GBP
View
Final sale: no returns
Retailer 3
-
£204 GBP
View
Price last confirmed 41 days ago
Retailer 4
-
£215 GBP
View
Price last confirmed 41 days ago
Retailer 5
-
£218 GBP
View
Price last confirmed 35 days ago
A
Retailer 6
-
£287 GBP
View
B+
Retailer 7
-
£294 GBP
View
A
Retailer 8
-
£459 GBP
View
B+
Retailer 9
-
£538 GBP
View
B
Retailer 10
-
£722 GBP
View
Retailer 11
-
£774 GBP
View
Price last confirmed 38 days ago
B
Retailer 12
-
£962 GBP
View
B
Retailer 13
-
£1,029 GBP
View
B
Retailer 14
-
£1,255 GBP
View
Most Expensive
B
Do Amore Diamonds
27-D56BA13EA · Nov 6
£1,688 GBP
$2,260 USD
View
14 more retailers have this diamond
Prices start from £197 GBPSave up to £1,491 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
£197 GBP