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Oval|Lab Grown|IGI

1.23ct E IF Oval Lab Grown Diamond

ID • E/IF • IGI LG816625304

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG816625304

Diamond specifications and retailer prices

From £151 GBP
$201 USD
As of October 26, 2026
Save £1,298 GBP (90%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,449 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.23ct lab-grown oval diamond

This 1.23ct lab-grown oval sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816625304 or 816625304. Listed at 17 retailers as of October 26, 2026, with prices from £151 to £1,449, a £1,298 spread on the same certified stone. Brilliant Earth lists it at £1,449. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.3°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816625304
Dimensions8.61 × 6.12 × 3.69 mm
L/W Ratio1.41
Girdle conditionFaceted
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
8.61 mm6.12 mm1.23 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG816625304
Side View
Table 58.0%Crown 34.3°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 60.3%

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: Oct 26
Current: £1,449 GBP|Low: £147 GBP|High: £1,449 GBP|Avg: £487 GBP
Brilliant Earth
Retailer 2
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Retailer 18
October 29, 2026
Retailer 10£151 GBP
Retailer 7£169 GBP
Retailer 16£175 GBP
Retailer 3£187 GBP
Retailer 18£187 GBP
Retailer 12£321 GBP
Retailer 8£325 GBP
Retailer 14£326 GBP
Retailer 2£342 GBP
Retailer 15£481 GBP
Retailer 5£594 GBP
Retailer 4£601 GBP
Retailer 9£628 GBP
Retailer 6£641 GBP
Retailer 17£662 GBP
Retailer 11£878 GBP
Retailer 13£1,104 GBP
Brilliant Earth£1,449 GBP

40 data points across 18 retailers

17 retailers£151 GBP to £1,449 GBP

A
Cheapest Retailer
-
£151 GBP
$201 USD
A
Retailer 2
-
£169 GBP
$225 USD
View
Final sale: no returns
A
Retailer 3
-
£175 GBP
$233 USD
View
A
Retailer 4
-
£187 GBP
$249 USD
View
A
Retailer 5
-
£187 GBP
$249 USD
View
A
Retailer 6
-
£321 GBP
ZAR 6,904 ZAR
View
A
Retailer 7
-
£325 GBP
$433 USD
View
A
Retailer 8
-
£342 GBP
View
A
Retailer 9
-
£481 GBP
$641 USD
View
B+
Retailer 10
-
£594 GBP
$791 USD
View
B+
Retailer 11
-
£601 GBP
$800 USD
View
B+
Retailer 12
-
£628 GBP
SGD 1,131 SGD
View
B+
Retailer 13
-
£641 GBP
$854 USD
View
B+
Retailer 14
-
£662 GBP
$881 USD
View
B+
Retailer 15
-
£878 GBP
View
B
Retailer 16
-
£1,104 GBP
$1,470 USD
View
Price last confirmed 10 days ago
Most Expensive
B
Brilliant Earth
21434459A · Oct 29
£1,449 GBP
$1,930 USD
View
16 more retailers have this diamond
Prices start from £151 GBPSave up to £1,298 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 Oval
£151 GBP