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Radiant|Lab Grown|IGI

1.76ct F IF Radiant Lab Grown Diamond

ID • F/IF • IGI LG639405820

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

Certificate IGI LG639405820

Diamond specifications and retailer prices

From £1,612 GBP
As of November 4, 2026
Save £448 GBP (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,935 GBP at Brilliant Earth · As of October 18, 2026
View at Brilliant Earth

About this 1.76ct lab-grown radiant diamond

This 1.76ct 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 LG639405820 or 639405820. Listed at 4 retailers as of November 4, 2026, with a 28% 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

1.76
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.7°
Pavilion angle29.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG639405820
Dimensions8.96 × 5.88 × 3.80 mm
L/W Ratio1.52
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
8.96 mm5.88 mm1.76 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG639405820
Side View
Table 66.0%Crown 41.7°Girdle: MediumPavilion 29.8°Culet: NoneDepth 64.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 4
Current: £2,935 GBP|Low: £618 GBP|High: £3,031 GBP|Avg: £1,576 GBP|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 4, 2026
Retailer 11£710 GBP
Retailer 8£751 GBP
Retailer 7£910 GBP
Retailer 6£1,169 GBP
Retailer 5£1,230 GBP
Retailer 9£1,535 GBP
Retailer 2£1,612 GBP
Retailer 4£2,060 GBP
Retailer 3£2,476 GBP
Retailer 10£2,826 GBP
Brilliant Earth£2,935 GBP

7 data points across 11 retailers

4 retailers£1,612 GBP to £2,060 GBP

Retailer 1
-
£1,230 GBP
Price last confirmed 18 days ago
B
Retailer 2
-
£1,612 GBP
View
B
Retailer 3
-
£2,060 GBP
View
Most Expensive
Brilliant Earth
17792853Y · Oct 18
£2,935 GBP
$3,950 USD
View
Price last confirmed 17 days ago
3 more retailers have this diamond
Prices start from £1,612 GBPSave up to £448 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
1.76ct Radiant
£1,612 GBP