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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 $401 CAD
$287 USD
As of October 30, 2026
Save $2,407 CAD (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,808 CAD at Brilliant Earth · As of October 28, 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 28, 2026, with prices from $401 to $2,808, a $2,407 spread on the same certified stone. Brilliant Earth lists it at $2,808. 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: $2,808 CAD|Low: $401 CAD|High: $2,822 CAD|Avg: $1,178 CAD|-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 30, 2026
Retailer 6$401 CAD
Retailer 11$471 CAD
Retailer 17$657 CAD
Retailer 8$742 CAD
Retailer 15$752 CAD
Retailer 14$763 CAD
Retailer 10$848 CAD
Retailer 4$901 CAD
Retailer 9$979 CAD
Retailer 13$1,081 CAD
Retailer 16$1,108 CAD
Retailer 5$1,133 CAD
Retailer 3$1,430 CAD
Retailer 7$1,500 CAD
Retailer 2$1,748 CAD
Retailer 12$1,790 CAD
Brilliant Earth$2,808 CAD

32 data points across 17 retailers

22 retailers$401 CAD to $2,808 CAD

A
Cheapest Retailer
-
$401 CAD
$287 USD
Final sale: no returns
Retailer 2
-
$446 CAD
$319 USD
View
Price last confirmed 25 days ago
A
Retailer 3
-
$471 CAD
£266 GBP
View
Retailer 4
-
$539 CAD
$386 USD
View
Price last confirmed 31 days ago
Retailer 5
-
$576 CAD
$412 USD
View
Price last confirmed 25 days ago
A
Retailer 6
-
$657 CAD
$470 USD
View
A
Retailer 7
-
$742 CAD
$531 USD
View
A
Retailer 8
-
$752 CAD
€513 EUR
View
A
Retailer 9
-
$763 CAD
ZAR 8,825 ZAR
View
A
Retailer 10
-
$848 CAD
£478 GBP
View
A
Retailer 11
-
$901 CAD
$645 USD
View
A
Retailer 12
-
$979 CAD
A$1,078 AUD
View
A
Retailer 13
-
$1,081 CAD
A$1,190 AUD
View
B+
Retailer 14
-
$1,108 CAD
$793 USD
View
B+
Retailer 15
-
$1,133 CAD
$811 USD
View
B+
Retailer 16
-
$1,430 CAD
SGD 1,383 SGD
View
B+
Retailer 17
-
$1,500 CAD
$1,073 USD
View
B+
Retailer 18
-
$1,748 CAD
A$1,925 AUD
View
B+
Retailer 19
-
$1,790 CAD
£1,009 GBP
View
Retailer 20
-
$1,851 CAD
$1,325 USD
View
Price last confirmed 26 days ago
Retailer 21
-
$2,307 CAD
$1,651 USD
View
Price last confirmed 82 days ago
Most Expensive
B
Brilliant Earth
18981391A · Oct 28
$2,808 CAD
$2,010 USD
View
21 more retailers have this diamond
Prices start from $401 CADSave up to $2,407 CAD

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
$401 CAD