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Radiant|Lab Grown|IGI

1.68ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG744514676

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

Certificate IGI LG744514676

Diamond specifications and retailer prices

From £210 GBP
$282 USD
As of October 30, 2026
Save £2,320 GBP (92%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,530 GBP at Brilliant Earth · As of October 30, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG744514676 or 744514676. Listed at 17 retailers as of October 30, 2026, with prices from £210 to £2,530, a £2,320 spread on the same certified stone. Brilliant Earth lists it at £2,530. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.68
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG744514676
Dimensions8.23 × 5.73 × 4.13 mm
L/W Ratio1.44
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
8.23 mm5.73 mm1.68 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG744514676
Side View
Table 66.0%Crown 45.7°Girdle: ThickPavilion 37.3°Culet: NoneDepth 72.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,530 GBP|Low: £187 GBP|High: £3,724 GBP|Avg: £1,007 GBP|-32.1%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
October 31, 2026
Retailer 14£210 GBP
Retailer 6£244 GBP
Retailer 9£263 GBP
Retailer 15£393 GBP
Retailer 3£429 GBP
Retailer 10£429 GBP
Retailer 2£477 GBP
Retailer 13£671 GBP
Retailer 8£722 GBP
Retailer 17£801 GBP
Retailer 5£823 GBP
Retailer 4£925 GBP
Retailer 12£1,160 GBP
Retailer 11£1,339 GBP
Retailer 16£1,866 GBP
Retailer 7£2,168 GBP
Brilliant Earth£2,530 GBP

38 data points across 17 retailers

17 retailers£210 GBP to £2,530 GBP

A
Cheapest Retailer
-
£210 GBP
$282 USD
A
Retailer 2
-
£244 GBP
$327 USD
View
A
Retailer 3
-
£263 GBP
$352 USD
View
Final sale: no returns
A
Retailer 4
-
£393 GBP
$527 USD
View
A
Retailer 5
-
£429 GBP
$575 USD
View
A
Retailer 6
-
£429 GBP
$575 USD
View
A
Retailer 7
-
£477 GBP
€609 EUR
View
A
Retailer 8
-
£671 GBP
A$1,383 AUD
View
A
Retailer 9
-
£722 GBP
$968 USD
View
B+
Retailer 10
-
£801 GBP
$1,073 USD
View
A
Retailer 11
-
£823 GBP
$1,102 USD
View
B+
Retailer 12
-
£925 GBP
$1,240 USD
View
B+
Retailer 13
-
£1,160 GBP
View
B+
Retailer 14
-
£1,339 GBP
A$2,761 AUD
View
B
Retailer 15
-
£1,866 GBP
$2,500 USD
View
B
Retailer 16
-
£2,168 GBP
$2,905 USD
View
Most Expensive
B
Brilliant Earth
17496203Y · Oct 30
£2,530 GBP
$3,390 USD
View
16 more retailers have this diamond
Prices start from £210 GBPSave up to £2,320 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
£210 GBP