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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 $287 USD
As of October 30, 2026
Save $1,723 USD (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,010 USD 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 $287 to $2,010, a $1,723 spread on the same certified stone. Brilliant Earth lists it at $2,010. 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: $2,010 USD|Low: $287 USD|High: $2,020 USD|Avg: $843 USD|-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$287 USD
Retailer 11$337 USD
Retailer 17$470 USD
Retailer 8$531 USD
Retailer 15$539 USD
Retailer 14$546 USD
Retailer 10$607 USD
Retailer 4$645 USD
Retailer 9$701 USD
Retailer 13$774 USD
Retailer 16$793 USD
Retailer 5$811 USD
Retailer 3$1,023 USD
Retailer 7$1,073 USD
Retailer 2$1,251 USD
Retailer 12$1,281 USD
Brilliant Earth$2,010 USD

32 data points across 17 retailers

22 retailers$287 USD to $2,010 USD

A
Cheapest Retailer
-
$287 USD
Final sale: no returns
Retailer 2
-
$319 USD
View
Price last confirmed 25 days ago
A
Retailer 3
-
$337 USD
£266 GBP
View
Retailer 4
-
$386 USD
View
Price last confirmed 32 days ago
Retailer 5
-
$412 USD
View
Price last confirmed 25 days ago
A
Retailer 6
-
$470 USD
View
A
Retailer 7
-
$531 USD
View
A
Retailer 8
-
$539 USD
€513 EUR
View
A
Retailer 9
-
$546 USD
ZAR 8,825 ZAR
View
A
Retailer 10
-
$607 USD
£478 GBP
View
A
Retailer 11
-
$645 USD
View
A
Retailer 12
-
$701 USD
A$1,078 AUD
View
A
Retailer 13
-
$774 USD
A$1,190 AUD
View
B+
Retailer 14
-
$793 USD
View
B+
Retailer 15
-
$811 USD
View
B+
Retailer 16
-
$1,023 USD
SGD 1,383 SGD
View
B+
Retailer 17
-
$1,073 USD
View
B+
Retailer 18
-
$1,251 USD
A$1,925 AUD
View
B+
Retailer 19
-
$1,281 USD
£1,009 GBP
View
Retailer 20
-
$1,325 USD
View
Price last confirmed 26 days ago
Retailer 21
-
$1,651 USD
View
Price last confirmed 82 days ago
Most Expensive
B
Brilliant Earth
18981391A · Oct 30
$2,010 USD
View
21 more retailers have this diamond
Prices start from $287 USDSave up to $1,723 USD

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
$287 USD