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Radiant|Lab Grown|IGI

1.05ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG536279079

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

Certificate IGI LG536279079

Diamond specifications and retailer prices

From £244 GBP
$327 USD
As of October 31, 2026
Save £240 GBP (50%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £484 GBP at Diamond Quarter · As of October 31, 2026
View at Diamond Quarter

About this 1.05ct lab-grown radiant diamond

This 1.05ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG536279079 or 536279079. Listed at 2 retailers as of October 31, 2026, with prices from £244 to £484, a £240 spread on the same certified stone. Diamond Quarter lists it at £484. 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

1.05
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.9°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG536279079
Dimensions7.05 × 5.03 × 3.41 mm
L/W Ratio1.40
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
7.05 mm5.03 mm1.05 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG536279079
Side View
Table 65.0%Crown 48.9°Girdle: Slightly ThickPavilion 35.8°Culet: NoneDepth 67.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £244 GBP|Low: £67 GBP|High: £709 GBP|Avg: £363 GBP|+4.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
September 23, 2026
Retailer 3£67 GBP
Retailer 5£199 GBP
Retailer 4£226 GBP
Retailer 1£244 GBP
Retailer 2£519 GBP
Retailer 6£709 GBP

29 data points across 6 retailers

2 retailers£244 GBP to £484 GBP

A
Cheapest Retailer
-
£244 GBP
$327 USD
Most Expensive
B
Diamond Quarter
1.05SI1DLG798617N · Oct 31
£484 GBP
View
1 more retailer has this diamond
Prices start from £244 GBPSave up to £240 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
1.05ct Radiant
£244 GBP