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Asscher|Lab Grown|IGI

1.78ct D FL Asscher Lab Grown Diamond

ID • D/FL • IGI LG830624089

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG830624089

Diamond specifications and retailer prices

From £344 GBP
$458 USD
As of October 30, 2026
Save £3,929 GBP (92%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £4,273 GBP at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.78ct lab-grown asscher diamond

This 1.78ct 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 LG830624089 or 830624089. Listed at 21 retailers as of October 28, 2026, with prices from £344 to £4,273, a £3,929 spread on the same certified stone. Brilliant Earth lists it at £4,273. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830624089
Dimensions6.70 × 6.68 × 4.39 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
6.70 mm6.68 mm1.78 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830624089
Side View
Table 60.0%Crown 35.9°Girdle: MediumPavilion 39.2°Culet: NoneDepth 65.7%

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: £4,273 GBP|Low: £344 GBP|High: £4,295 GBP|Avg: £1,512 GBP|-0.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 10
Retailer 11
Retailer 12
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Retailer 20
October 30, 2026
Retailer 10£344 GBP
Retailer 6£385 GBP
Retailer 20£427 GBP
Retailer 7£500 GBP
Retailer 15£533 GBP
Retailer 19£667 GBP
Retailer 2£705 GBP
Retailer 14£733 GBP
Retailer 13£878 GBP
Retailer 18£988 GBP
Retailer 4£1,060 GBP
Retailer 3£1,370 GBP
Retailer 5£1,394 GBP
Retailer 16£1,487 GBP
Retailer 17£1,569 GBP
Retailer 12£1,728 GBP
Retailer 8£1,821 GBP
Retailer 9£2,548 GBP
Retailer 11£2,951 GBP
Brilliant Earth£4,273 GBP

28 data points across 20 retailers

21 retailers£344 GBP to £4,273 GBP

A
Cheapest Retailer
-
£344 GBP
$458 USD
A
Retailer 2
-
£385 GBP
$513 USD
View
A
Retailer 3
-
£427 GBP
$568 USD
View
A
Retailer 4
-
£500 GBP
$666 USD
View
Final sale: no returns
A
Retailer 5
-
£533 GBP
$710 USD
View
Retailer 6
-
£556 GBP
$740 USD
View
Price last confirmed 14 days ago
A
Retailer 7
-
£667 GBP
$888 USD
View
A
Retailer 8
-
£705 GBP
View
A
Retailer 9
-
£733 GBP
ZAR 15,764 ZAR
View
A
Retailer 10
-
£878 GBP
€1,114 EUR
View
B+
Retailer 11
-
£988 GBP
$1,316 USD
View
B+
Retailer 12
-
£1,060 GBP
$1,411 USD
View
B+
Retailer 13
-
£1,370 GBP
$1,825 USD
View
B+
Retailer 14
-
£1,394 GBP
$1,856 USD
View
B+
Retailer 15
-
£1,487 GBP
$1,980 USD
View
B+
Retailer 16
-
£1,569 GBP
View
Retailer 17
-
£1,728 GBP
View
Price last confirmed 8 days ago
B+
Retailer 18
-
£1,821 GBP
SGD 3,277 SGD
View
B
Retailer 19
-
£2,548 GBP
$3,393 USD
View
Retailer 20
-
£2,951 GBP
$3,930 USD
View
Price last confirmed 9 days ago
Most Expensive
B
Brilliant Earth
21416980A · Oct 28
£4,273 GBP
$5,690 USD
View
20 more retailers have this diamond
Prices start from £344 GBPSave up to £3,929 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
1.78ct Asscher
£344 GBP