CaratHunter
Plans
Asscher|Lab Grown|IGI

1.66ct D FL Asscher Lab Grown Diamond

ID • D/FL • IGI LG840634858

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG840634858

Diamond specifications and retailer prices

From £419 GBP
As of November 2, 2026
Save £2,338 GBP (85%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,757 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.66ct lab-grown asscher diamond

This 1.66ct lab-grown asscher 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 LG840634858 or 840634858. Listed at 16 retailers as of November 2, 2026, with prices from £419 to £2,757, a £2,338 spread on the same certified stone. Brilliant Earth lists it at £2,757. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634858
Dimensions6.57 × 6.47 × 4.30 mm
L/W Ratio1.02
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
6.57 mm6.47 mm1.66 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634858
Side View
Table 66.0%Crown 35°Girdle: MediumPavilion 39.7°Culet: NoneDepth 66.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £2,757 GBP|Low: £419 GBP|High: £3,942 GBP|Avg: £1,337 GBP|-30.1%
Brilliant Earth
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
Retailer 16
November 2, 2026
Retailer 9£419 GBP
Retailer 6£463 GBP
Retailer 16£503 GBP
Retailer 3£624 GBP
Retailer 11£654 GBP
Retailer 10£684 GBP
Retailer 15£815 GBP
Retailer 4£924 GBP
Retailer 2£967 GBP
Retailer 5£1,298 GBP
Retailer 14£1,376 GBP
Retailer 13£1,456 GBP
Retailer 7£1,690 GBP
Retailer 8£2,358 GBP
Retailer 12£2,750 GBP
Brilliant Earth£2,757 GBP

18 data points across 16 retailers

16 retailers£419 GBP to £2,757 GBP

A
Cheapest Retailer
-
£419 GBP
A
Retailer 2
-
£463 GBP
$621 USD
View
Final sale: no returns
A
Retailer 3
-
£503 GBP
$675 USD
View
A
Retailer 4
-
£624 GBP
$837 USD
View
A
Retailer 5
-
£654 GBP
View
A
Retailer 6
-
£684 GBP
ZAR 14,819 ZAR
View
A
Retailer 7
-
£815 GBP
€1,042 EUR
View
B+
Retailer 8
-
£924 GBP
$1,240 USD
View
B+
Retailer 9
-
£967 GBP
$1,298 USD
View
B+
Retailer 10
-
£1,298 GBP
$1,742 USD
View
B+
Retailer 11
-
£1,376 GBP
$1,847 USD
View
B+
Retailer 12
-
£1,456 GBP
View
B+
Retailer 13
-
£1,690 GBP
SGD 3,065 SGD
View
B
Retailer 14
-
£2,358 GBP
$3,164 USD
View
B
Retailer 15
-
£2,750 GBP
$3,690 USD
View
Most Expensive
B
Brilliant Earth
21861625A · Nov 2
£2,757 GBP
$3,700 USD
View
15 more retailers have this diamond
Prices start from £419 GBPSave up to £2,338 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
1.66ct Asscher
£419 GBP