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Radiant|Lab Grown|IGI

1.33ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG689516105

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

Certificate IGI LG689516105

Diamond specifications and retailer prices

From £270 GBP
As of November 4, 2026
Save £913 GBP (77%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,667 GBP at Brilliant Earth · As of October 8, 2026
View at Brilliant Earth

About this 1.33ct lab-grown radiant diamond

This 1.33ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG689516105 or 689516105. Listed at 14 retailers as of November 4, 2026, with a 338% 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

1.33
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689516105
Dimensions6.56 × 6.23 × 3.88 mm
L/W Ratio1.05
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
6.56 mm6.23 mm1.33 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689516105
Side View
Table 58.0%Crown 37.8°Girdle: MediumPavilion 34.9°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £2,667 GBP|Low: £270 GBP|High: £2,667 GBP|Avg: £792 GBP
Brilliant Earth
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
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Retailer 17
November 4, 2026
Retailer 4£270 GBP
Retailer 8£279 GBP
Retailer 17£300 GBP
Retailer 2£308 GBP
Retailer 12£404 GBP
Retailer 10£415 GBP
Retailer 3£485 GBP
Retailer 16£488 GBP
Retailer 11£517 GBP
Retailer 15£718 GBP
Retailer 7£796 GBP
Retailer 5£997 GBP
Retailer 9£1,129 GBP
Retailer 6£1,184 GBP
Retailer 14£1,208 GBP
Retailer 13£1,393 GBP
Brilliant Earth£2,667 GBP

33 data points across 17 retailers

14 retailers£270 GBP to £1,184 GBP

A
Cheapest Retailer
-
£270 GBP
Final sale: no returns
Retailer 2
-
£300 GBP
View
Price last confirmed 10 days ago
A
Retailer 3
-
£308 GBP
View
A
Retailer 4
-
£404 GBP
View
A
Retailer 5
-
£415 GBP
View
A
Retailer 6
-
£485 GBP
View
A
Retailer 7
-
£517 GBP
View
B+
Retailer 8
-
£718 GBP
View
B
Retailer 9
-
£997 GBP
View
B
Retailer 10
-
£1,184 GBP
View
Retailer 11
-
£1,208 GBP
View
Price last confirmed 16 days ago
Retailer 12
-
£1,393 GBP
View
Price last confirmed 17 days ago
Retailer 13
-
£1,439 GBP
View
Price last confirmed 87 days ago
Most Expensive
Brilliant Earth
21386154A · Oct 8
£2,667 GBP
$3,600 USD
View
Price last confirmed 27 days ago
13 more retailers have this diamond
Prices start from £270 GBPSave up to £913 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
1.33ct Radiant
£270 GBP