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Asscher|Lab Grown|IGI

1.66ct D FL Asscher Lab Grown Diamond

ID • D/FL • IGI LG840629952

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG840629952

Diamond specifications and retailer prices

From £320 GBP
$429 USD
As of November 2, 2026
Save £2,438 GBP (88%) vs most expensive(unlock to see where)
19 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 LG840629952 or 840629952. Listed at 19 retailers as of November 2, 2026, with prices from £320 to £2,757, a £2,438 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 angle35.3°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840629952
Dimensions6.50 × 6.50 × 4.30 mm
L/W Ratio1.00
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
6.50 mm6.50 mm1.66 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840629952
Side View
Table 63.0%Crown 35.3°Girdle: MediumPavilion 39°Culet: NoneDepth 66.2%

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: £320 GBP|High: £3,942 GBP|Avg: £1,089 GBP|-30.1%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 5
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Retailer 11
Retailer 12
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Retailer 19
November 2, 2026
Retailer 4£320 GBP
Retailer 16£358 GBP
Retailer 8£396 GBP
Retailer 2£419 GBP
Retailer 10£463 GBP
Retailer 9£503 GBP
Retailer 18£579 GBP
Retailer 3£624 GBP
Retailer 13£654 GBP
Retailer 12£684 GBP
Retailer 6£924 GBP
Retailer 17£1,112 GBP
Retailer 15£1,274 GBP
Retailer 7£1,298 GBP
Retailer 19£1,376 GBP
Retailer 11£1,690 GBP
Retailer 5£2,358 GBP
Retailer 14£2,750 GBP
Brilliant Earth£2,757 GBP

6 data points across 19 retailers

19 retailers£320 GBP to £2,757 GBP

A
Cheapest Retailer
-
£320 GBP
$429 USD
A
Retailer 2
-
£358 GBP
$480 USD
View
A
Retailer 3
-
£396 GBP
$532 USD
View
A
Retailer 4
-
£419 GBP
View
A
Retailer 5
-
£463 GBP
$621 USD
View
Final sale: no returns
A
Retailer 6
-
£503 GBP
$675 USD
View
A
Retailer 7
-
£579 GBP
$777 USD
View
A
Retailer 8
-
£624 GBP
$837 USD
View
A
Retailer 9
-
£654 GBP
View
A
Retailer 10
-
£684 GBP
ZAR 14,819 ZAR
View
B+
Retailer 11
-
£924 GBP
$1,240 USD
View
B+
Retailer 12
-
£1,112 GBP
$1,492 USD
View
B+
Retailer 13
-
£1,274 GBP
$1,710 USD
View
B+
Retailer 14
-
£1,298 GBP
$1,742 USD
View
B+
Retailer 15
-
£1,376 GBP
$1,847 USD
View
B
Retailer 16
-
£1,690 GBP
SGD 3,065 SGD
View
B
Retailer 17
-
£2,358 GBP
$3,164 USD
View
B
Retailer 18
-
£2,750 GBP
$3,690 USD
View
Most Expensive
B
Brilliant Earth
22348713A · Nov 2
£2,757 GBP
$3,700 USD
View
18 more retailers have this diamond
Prices start from £320 GBPSave up to £2,438 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
£320 GBP