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Radiant|Lab Grown|IGI

1.69ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG614320039

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

Certificate IGI LG614320039

Diamond specifications and retailer prices

From £745 GBP
As of October 31, 2026
Save £83 GBP (10%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £828 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.69ct lab-grown radiant diamond

This 1.69ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG614320039 or 614320039. Listed at 2 retailers as of October 31, 2026, with a relatively tight 11% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.69
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.9°
Pavilion angle34.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG614320039
Dimensions8.49 × 5.86 × 3.93 mm
L/W Ratio1.45
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.49 mm5.86 mm1.69 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG614320039
Side View
Table 65.0%Crown 43.9°Girdle: MediumPavilion 34.8°Culet: NoneDepth 67.1%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £828 GBP|Low: £261 GBP|High: £1,381 GBP|Avg: £702 GBP|-40.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
September 3, 2026
Retailer 3£261 GBP
Retailer 4£318 GBP
Retailer 5£467 GBP
Retailer 6£709 GBP
Brilliant Earth£828 GBP
Retailer 2£1,209 GBP

24 data points across 6 retailers

2 retailers£745 GBP to £828 GBP

B+
Cheapest Retailer
-
£745 GBP
Most Expensive
B
Brilliant Earth
8909201Y · Oct 31
£828 GBP
$1,110 USD
View
1 more retailer has this diamond
Prices start from £745 GBPSave up to £83 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.

B+
1.69ct Radiant
£745 GBP