Asscher|Lab Grown|IGI

1.78ct D FL Asscher Lab Grown Diamond

ID • D/FL • IGI LG788630252

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG788630252

Diamond specifications and retailer prices

From £302 GBP

$405 USD

As of October 27, 2026

Save £3,922 GBP (93%) vs most expensive(unlock to see where)

12 retailers carry this diamond

Most expensive: £4,224 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 LG788630252 or 788630252. Listed at 12 retailers as of October 27, 2026, with prices from £302 to £4,224, a £3,922 spread on the same certified stone. Brilliant Earth lists it at £4,224. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78

Carat

Colour

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle30.1°

Pavilion angle40°

OriginLab Grown

Grading LabIGI

CertificateIGI LG788630252

Dimensions6.78 × 6.70 × 4.31 mm

L/W Ratio1.01

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

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG788630252

Side View

Caratlytics Score

How it works →

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: Oct 27

Current: £4,224 GBP|Low: £339 GBP|High: £5,120 GBP|Avg: £1,792 GBP|-2.9%

Brilliant Earth

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October 29, 2026

Retailer 16£339 GBP

Retailer 13£580 GBP

Retailer 14£593 GBP

Retailer 3£646 GBP

Retailer 15£1,002 GBP

Retailer 8£1,054 GBP

Retailer 11£1,085 GBP

Retailer 6£1,197 GBP

Retailer 5£1,218 GBP

Retailer 19£1,223 GBP

Retailer 12£1,299 GBP

Retailer 18£1,565 GBP

Retailer 9£1,861 GBP

Retailer 4£2,059 GBP

Retailer 10£2,292 GBP

Retailer 7£2,619 GBP

Retailer 2£2,620 GBP

Retailer 17£2,911 GBP

Brilliant Earth£4,224 GBP

28 data points across 19 retailers

12 retailers£302 GBP to £4,224 GBP

Cheapest Retailer

£302 GBP

$405 USD

Retailer 2

£339 GBP

$454 USD

View

Retailer 3

£580 GBP

$777 USD

View

Retailer 4

£593 GBP

$795 USD

View

Retailer 5

£646 GBP

$866 USD

View

Final sale: no returns

B+

Retailer 6

£1,002 GBP

$1,343 USD

View

B+

Retailer 7

£1,223 GBP

$1,638 USD

View

B+

Retailer 8

£1,299 GBP

$1,740 USD

View

Retailer 9

£1,565 GBP

View

Price last confirmed 12 days ago

Retailer 10

£2,620 GBP

$3,510 USD

View

Retailer 11

£2,911 GBP

$3,900 USD

View

Price last confirmed 9 days ago

Most Expensive

Brilliant Earth

21413558Y · Oct 28

£4,224 GBP

$5,660 USD

View

11 more retailers have this diamond

Prices start from £302 GBPSave up to £3,922 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.

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1.78ct Asscher

£302 GBP