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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 €257 EUR
$287 USD
As of October 30, 2026
Save €1,542 EUR (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: €1,799 EUR at Brilliant Earth · As of October 30, 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 €257 to €1,799, a €1,542 spread on the same certified stone. Brilliant Earth lists it at €1,799. 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
Color
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: €1,799 EUR|Low: €257 EUR|High: €1,808 EUR|Avg: €754 EUR|-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
Retailer 16
Retailer 17
October 31, 2026
Retailer 6€257 EUR
Retailer 12€302 EUR
Retailer 10€416 EUR
Retailer 8€475 EUR
Retailer 16€482 EUR
Retailer 15€489 EUR
Retailer 2€543 EUR
Retailer 4€577 EUR
Retailer 9€627 EUR
Retailer 14€692 EUR
Retailer 17€710 EUR
Retailer 5€726 EUR
Retailer 3€916 EUR
Retailer 7€961 EUR
Retailer 11€1,120 EUR
Retailer 13€1,147 EUR
Brilliant Earth€1,799 EUR

33 data points across 17 retailers

22 retailers€257 EUR to €1,799 EUR

A
Cheapest Retailer
-
€257 EUR
$287 USD
Final sale: no returns
Retailer 2
-
€286 EUR
$319 USD
View
Price last confirmed 26 days ago
A
Retailer 3
-
€302 EUR
£266 GBP
View
Retailer 4
-
€346 EUR
$386 USD
View
Price last confirmed 33 days ago
Retailer 5
-
€369 EUR
$412 USD
View
Price last confirmed 27 days ago
A
Retailer 6
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€416 EUR
$465 USD
View
A
Retailer 7
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€475 EUR
$531 USD
View
A
Retailer 8
-
€482 EUR
View
A
Retailer 9
-
€489 EUR
ZAR 8,825 ZAR
View
A
Retailer 10
-
€543 EUR
£478 GBP
View
A
Retailer 11
-
€577 EUR
$645 USD
View
A
Retailer 12
-
€627 EUR
A$1,078 AUD
View
A
Retailer 13
-
€692 EUR
A$1,190 AUD
View
B+
Retailer 14
-
€710 EUR
$793 USD
View
B+
Retailer 15
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€726 EUR
$811 USD
View
B+
Retailer 16
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€916 EUR
SGD 1,383 SGD
View
B+
Retailer 17
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€961 EUR
$1,073 USD
View
B+
Retailer 18
-
€1,120 EUR
A$1,925 AUD
View
B+
Retailer 19
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€1,147 EUR
£1,009 GBP
View
Retailer 20
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€1,186 EUR
$1,325 USD
View
Price last confirmed 27 days ago
Retailer 21
-
€1,478 EUR
$1,651 USD
View
Price last confirmed 83 days ago
Most Expensive
B
Brilliant Earth
18981391A · Oct 30
€1,799 EUR
$2,010 USD
View
21 more retailers have this diamond
Prices start from €257 EURSave up to €1,542 EUR

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
€257 EUR