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Radiant|Lab Grown|IGI

1.68ct F IF Radiant Lab Grown Diamond

VG • F/IF • IGI LG816615263

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

Certificate IGI LG816615263

Diamond specifications and retailer prices

From £216 GBP
As of November 4, 2026
Save £1,701 GBP (89%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,917 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.68ct lab-grown radiant diamond

This 1.68ct 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 very-good cut grade and certified by IGI LG816615263 or 816615263. Listed at 13 retailers as of November 4, 2026, with prices from £216 to £1,917, a £1,701 spread on the same certified stone. Brilliant Earth lists it at £1,917. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.68
Carat
F
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816615263
Dimensions8.54 × 5.84 × 3.82 mm
L/W Ratio1.46
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
8.54 mm5.84 mm1.68 ctF / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816615263
Side View
Table 63.0%Crown 42.1°Girdle: MediumPavilion 35.6°Culet: NoneDepth 65.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £1,917 GBP|Low: £174 GBP|High: £2,459 GBP|Avg: £853 GBP|-22.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
November 5, 2026
Retailer 11£216 GBP
Retailer 17£299 GBP
Retailer 13£326 GBP
Retailer 4£349 GBP
Retailer 7£448 GBP
Retailer 3£449 GBP
Retailer 6£465 GBP
Retailer 16£619 GBP
Retailer 12£687 GBP
Retailer 14£779 GBP
Retailer 8£902 GBP
Retailer 9£907 GBP
Retailer 15£927 GBP
Retailer 10£1,056 GBP
Retailer 2£1,716 GBP
Retailer 5£1,757 GBP
Brilliant Earth£1,917 GBP

22 data points across 17 retailers

13 retailers£216 GBP to £1,917 GBP

A
Cheapest Retailer
-
£216 GBP
Final sale: no returns
A
Retailer 2
-
£299 GBP
View
B+
Retailer 3
-
£326 GBP
View
A
Retailer 4
-
£349 GBP
View
A
Retailer 5
-
£449 GBP
View
A
Retailer 6
-
£619 GBP
View
B+
Retailer 7
-
£687 GBP
View
B+
Retailer 8
-
£779 GBP
View
B+
Retailer 9
-
£927 GBP
View
B+
Retailer 10
-
£1,056 GBP
View
B
Retailer 11
-
£1,716 GBP
View
Retailer 12
-
£1,757 GBP
View
Price last confirmed 18 days ago
Most Expensive
B
Brilliant Earth
21730775Y · Nov 4
£1,917 GBP
$2,580 USD
View
12 more retailers have this diamond
Prices start from £216 GBPSave up to £1,701 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
1.68ct Radiant
£216 GBP