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Princess|Lab Grown|IGI

1.23ct E SI1 Princess Lab Grown Diamond

ID • E/SI1 • IGI LG555291418

Shape and cutting style on the report: Princess cut

Certificate IGI LG555291418

Diamond specifications and retailer prices

From $158 USD
As of October 30, 2026
Save $763 USD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $921 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.23ct lab-grown princess diamond

This 1.23ct lab-grown princess sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG555291418 or 555291418. Listed at 16 retailers as of October 29, 2026, with prices from $158 to $921, a $763 spread on the same certified stone. MOH London lists it at $921. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.23
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG555291418
Dimensions5.82 × 5.68 × 4.16 mm
L/W Ratio1.02
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
5.82 mm5.68 mm1.23 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG555291418
Side View
Table 71.0%Crown 46°Girdle: MediumPavilion 39.1°Culet: NoneDepth 73.2%

Caratlytics Score

How it works →
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: $921 USD|Low: $145 USD|High: $1,080 USD|Avg: $429 USD|+5.4%
MOH London
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
October 30, 2026
Retailer 5$158 USD
Retailer 3$183 USD
Retailer 13$196 USD
Retailer 14$196 USD
Retailer 9$255 USD
Retailer 7$265 USD
Retailer 11$338 USD
Retailer 10$344 USD
Retailer 12$382 USD
Retailer 16$404 USD
Retailer 4$522 USD
Retailer 15$630 USD
Retailer 6$665 USD
Retailer 2$760 USD
Retailer 8$761 USD
MOH London$921 USD

44 data points across 16 retailers

16 retailers$158 USD to $921 USD

A
Cheapest Retailer
-
$158 USD
A
Retailer 2
-
$183 USD
View
A
Retailer 3
-
$196 USD
View
A
Retailer 4
-
$196 USD
View
A
Retailer 5
-
$255 USD
£201 GBP
View
B+
Retailer 6
-
$265 USD
View
A
Retailer 7
-
$338 USD
€322 EUR
View
B+
Retailer 8
-
$344 USD
£271 GBP
View
B+
Retailer 9
-
$382 USD
£301 GBP
View
B+
Retailer 10
-
$404 USD
View
B+
Retailer 11
-
$522 USD
View
B
Retailer 12
-
$630 USD
View
B
Retailer 13
-
$665 USD
View
B
Retailer 14
-
$760 USD
View
Retailer 15
-
$761 USD
SGD 1,029 SGD
View
Price last confirmed 19 days ago
Most Expensive
B
MOH London
LG555291418 · Oct 29
$921 USD
£725 GBP
View
15 more retailers have this diamond
Prices start from $158 USDSave up to $763 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 Princess
$158 USD