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Radiant|Lab Grown|IGI

1.68ct D FL Radiant Lab Grown Diamond

EX • D/FL • IGI LG800677720

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

Certificate IGI LG800677720

Diamond specifications and retailer prices

From £428 GBP
$573 USD
As of October 30, 2026
Save £3,371 GBP (89%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,799 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG800677720 or 800677720. Listed at 14 retailers as of October 30, 2026, with prices from £428 to £3,799, a £3,371 spread on the same certified stone. Do Amore Diamonds lists it at £3,799. 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
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.3°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG800677720
Dimensions8.39 × 5.76 × 3.94 mm
L/W Ratio1.46
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
8.39 mm5.76 mm1.68 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG800677720
Side View
Table 64.0%Crown 42.3°Girdle: ThickPavilion 34.2°Culet: NoneDepth 68.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £3,799 GBP|Low: £406 GBP|High: £4,508 GBP|Avg: £1,802 GBP|-15.7%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 9£428 GBP
Retailer 14£479 GBP
Retailer 6£569 GBP
Retailer 11£628 GBP
Retailer 4£638 GBP
Retailer 5£780 GBP
Retailer 10£817 GBP
Retailer 3£936 GBP
Retailer 12£1,317 GBP
Retailer 13£1,540 GBP
Retailer 8£2,320 GBP
Retailer 7£2,535 GBP
Retailer 2£2,784 GBP
Retailer 15£2,993 GBP
Do Amore Diamonds£3,799 GBP

30 data points across 15 retailers

14 retailers£428 GBP to £3,799 GBP

A
Cheapest Retailer
-
£428 GBP
$573 USD
A
Retailer 2
-
£479 GBP
$642 USD
View
A
Retailer 3
-
£569 GBP
$762 USD
View
Final sale: no returns
A
Retailer 4
-
£628 GBP
$841 USD
View
A
Retailer 5
-
£638 GBP
$855 USD
View
A
Retailer 6
-
£780 GBP
$1,045 USD
View
A
Retailer 7
-
£817 GBP
$1,095 USD
View
B+
Retailer 8
-
£936 GBP
€1,195 EUR
View
B+
Retailer 9
-
£1,317 GBP
$1,764 USD
View
B+
Retailer 10
-
£1,540 GBP
$2,064 USD
View
B
Retailer 11
-
£2,320 GBP
View
B
Retailer 12
-
£2,784 GBP
$3,730 USD
View
B
Retailer 13
-
£2,993 GBP
$4,010 USD
View
Most Expensive
B
Do Amore Diamonds
27-865A96D28 · Oct 30
£3,799 GBP
$5,090 USD
View
13 more retailers have this diamond
Prices start from £428 GBPSave up to £3,371 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
£428 GBP