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Radiant|Lab Grown|IGI

1.68ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG825660118

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

Certificate IGI LG825660118

Diamond specifications and retailer prices

From £437 GBP
$586 USD
As of October 30, 2026
Save £2,574 GBP (85%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,011 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

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 LG825660118 or 825660118. Listed at 21 retailers as of October 28, 2026, with prices from £437 to £3,011, a £2,574 spread on the same certified stone. Rare Carat lists it at £3,011. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.5°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825660118
Dimensions8.14 × 5.77 × 4.15 mm
L/W Ratio1.41
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
8.14 mm5.77 mm1.68 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825660118
Side View
Table 64.0%Crown 45.5°Girdle: MED-STKPavilion 37.1°Culet: NoneDepth 71.9%

Caratlytics Score

How it works →
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: £3,011 GBP|Low: £437 GBP|High: £4,008 GBP|Avg: £1,526 GBP|-1.1%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
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Retailer 8
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Retailer 10
Retailer 11
Retailer 12
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Retailer 20
October 30, 2026
Retailer 11£437 GBP
Retailer 18£490 GBP
Retailer 7£508 GBP
Retailer 10£542 GBP
Retailer 17£638 GBP
Retailer 3£834 GBP
Retailer 14£847 GBP
Retailer 20£885 GBP
Retailer 16£932 GBP
Retailer 5£985 GBP
Retailer 4£1,222 GBP
Retailer 8£1,426 GBP
Retailer 6£1,581 GBP
Retailer 12£1,755 GBP
Retailer 2£1,778 GBP
Retailer 9£1,845 GBP
Retailer 15£2,367 GBP
Retailer 19£2,585 GBP
Retailer 13£2,926 GBP
Rare Carat£3,011 GBP

31 data points across 20 retailers

21 retailers£437 GBP to £3,011 GBP

A
Cheapest Retailer
-
£437 GBP
$586 USD
A
Retailer 2
-
£490 GBP
$656 USD
View
A
Retailer 3
-
£508 GBP
$680 USD
View
Final sale: no returns
A
Retailer 4
-
£542 GBP
$726 USD
View
Retailer 5
-
£578 GBP
$775 USD
View
Price last confirmed 14 days ago
A
Retailer 6
-
£638 GBP
$855 USD
View
A
Retailer 7
-
£834 GBP
$1,117 USD
View
A
Retailer 8
-
£847 GBP
View
Retailer 9
-
£885 GBP
€1,129 EUR
View
Price last confirmed 7 days ago
B+
Retailer 10
-
£932 GBP
ZAR 20,171 ZAR
View
B+
Retailer 11
-
£985 GBP
$1,320 USD
View
B+
Retailer 12
-
£1,222 GBP
$1,638 USD
View
B+
Retailer 13
-
£1,426 GBP
$1,911 USD
View
B+
Retailer 14
-
£1,581 GBP
View
B+
Retailer 15
-
£1,755 GBP
$2,352 USD
View
B
Retailer 16
-
£1,778 GBP
$2,382 USD
View
B+
Retailer 17
-
£1,845 GBP
SGD 3,340 SGD
View
B
Retailer 18
-
£2,367 GBP
View
B
Retailer 19
-
£2,585 GBP
$3,464 USD
View
B
Retailer 20
-
£2,926 GBP
$3,920 USD
View
Most Expensive
B
Rare Carat
PD-239706 · Oct 28
£3,011 GBP
$4,035 USD
View
20 more retailers have this diamond
Prices start from £437 GBPSave up to £2,574 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
£437 GBP