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Asscher|Lab Grown|IGI

1.23ct D IF Asscher Lab Grown Diamond

ID • D/IF • IGI LG739557450

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG739557450

Diamond specifications and retailer prices

From £170 GBP
$228 USD
As of October 30, 2026
Save £1,464 GBP (90%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,634 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.23ct lab-grown asscher diamond

This 1.23ct lab-grown asscher sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG739557450 or 739557450. Listed at 12 retailers as of October 30, 2026, with prices from £170 to £1,634, a £1,464 spread on the same certified stone. Brilliant Earth lists it at £1,634. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle42.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG739557450
Dimensions5.79 × 5.77 × 3.90 mm
L/W Ratio1.00
Culet sizePointed
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
5.79 mm5.77 mm1.23 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG739557450
Side View
Table 61.0%Crown 33.5°Girdle: STK-THKPavilion 42.8°Culet: NoneDepth 67.6%

Caratlytics Score

How it works →
A+
Exceptional
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 30
Current: £1,634 GBP|Low: £163 GBP|High: £1,717 GBP|Avg: £560 GBP|-3.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 10£170 GBP
Retailer 3£196 GBP
Retailer 7£357 GBP
Retailer 8£358 GBP
Retailer 11£379 GBP
Retailer 5£391 GBP
Retailer 9£514 GBP
Retailer 2£570 GBP
Retailer 6£678 GBP
Retailer 4£849 GBP
Brilliant Earth£1,634 GBP

36 data points across 11 retailers

12 retailers£170 GBP to £1,634 GBP

A+
Cheapest Retailer
-
£170 GBP
$228 USD
A
Retailer 2
-
£196 GBP
$263 USD
View
Final sale: no returns
Retailer 3
-
£219 GBP
$294 USD
View
Price last confirmed 38 days ago
A
Retailer 4
-
£357 GBP
$479 USD
View
Retailer 5
-
£358 GBP
$480 USD
View
Price last confirmed 5 days ago
Retailer 6
-
£379 GBP
€483 EUR
View
Price last confirmed 7 days ago
A
Retailer 7
-
£391 GBP
$524 USD
View
A
Retailer 8
-
£514 GBP
A$1,060 AUD
View
B+
Retailer 9
-
£570 GBP
$764 USD
View
B+
Retailer 10
-
£678 GBP
$908 USD
View
B+
Retailer 11
-
£849 GBP
View
Most Expensive
B
Brilliant Earth
16401632A · Oct 31
£1,634 GBP
$2,190 USD
View
11 more retailers have this diamond
Prices start from £170 GBPSave up to £1,464 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+
1.23ct Asscher
£170 GBP