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Marquise|Lab Grown|IGI

1.23ct E IF Marquise Lab Grown Diamond

EX • E/IF • IGI LG790626854

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790626854

Diamond specifications and retailer prices

From £214 GBP
$287 USD
As of October 30, 2026
Save £1,284 GBP (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £1,498 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.23ct lab-grown marquise diamond

This 1.23ct lab-grown marquise 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 LG790626854 or 790626854. Listed at 22 retailers as of October 30, 2026, with prices from £214 to £1,498, a £1,284 spread on the same certified stone. Brilliant Earth lists it at £1,498. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790626854
Dimensions11.15 × 5.61 × 3.49 mm
L/W Ratio1.99
Girdle conditionFaceted
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
11.15 mm5.61 mm1.23 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790626854
Side View
Table 59.0%Crown 36.4°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 62.2%

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: £1,498 GBP|Low: £214 GBP|High: £1,505 GBP|Avg: £608 GBP|-0.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
November 1, 2026
Retailer 6£214 GBP
Retailer 2£251 GBP
Retailer 11£347 GBP
Retailer 8£396 GBP
Retailer 16£401 GBP
Retailer 15£407 GBP
Retailer 10£452 GBP
Retailer 4£481 GBP
Retailer 9£522 GBP
Retailer 14£576 GBP
Retailer 17£591 GBP
Retailer 5£604 GBP
Retailer 3£763 GBP
Retailer 7£800 GBP
Retailer 12£932 GBP
Retailer 13£955 GBP
Brilliant Earth£1,498 GBP

33 data points across 17 retailers

22 retailers£214 GBP to £1,498 GBP

A
Cheapest Retailer
-
£214 GBP
$287 USD
Final sale: no returns
Retailer 2
-
£238 GBP
$319 USD
View
Price last confirmed 28 days ago
A
Retailer 3
-
£251 GBP
View
Retailer 4
-
£288 GBP
$386 USD
View
Price last confirmed 34 days ago
Retailer 5
-
£307 GBP
$412 USD
View
Price last confirmed 28 days ago
A
Retailer 6
-
£347 GBP
$465 USD
View
A
Retailer 7
-
£396 GBP
$531 USD
View
A
Retailer 8
-
£401 GBP
€513 EUR
View
A
Retailer 9
-
£407 GBP
ZAR 8,825 ZAR
View
A
Retailer 10
-
£452 GBP
View
A
Retailer 11
-
£481 GBP
$645 USD
View
A
Retailer 12
-
£522 GBP
A$1,078 AUD
View
A
Retailer 13
-
£576 GBP
A$1,190 AUD
View
B+
Retailer 14
-
£591 GBP
$793 USD
View
B+
Retailer 15
-
£604 GBP
$811 USD
View
B+
Retailer 16
-
£763 GBP
SGD 1,383 SGD
View
B+
Retailer 17
-
£800 GBP
$1,073 USD
View
B+
Retailer 18
-
£932 GBP
A$1,925 AUD
View
B+
Retailer 19
-
£955 GBP
View
Retailer 20
-
£987 GBP
$1,325 USD
View
Price last confirmed 29 days ago
Retailer 21
-
£1,231 GBP
$1,651 USD
View
Price last confirmed 85 days ago
Most Expensive
B
Brilliant Earth
18981391A · Oct 31
£1,498 GBP
$2,010 USD
View
21 more retailers have this diamond
Prices start from £214 GBPSave up to £1,284 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 Marquise
£214 GBP