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Round|Lab Grown|IGI

1.23ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG685550014

Shape and cutting style on the report: Round brilliant

Certificate IGI LG685550014

Diamond specifications and retailer prices

From $158 USD
As of November 5, 2026
Save $756 USD (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $914 USD at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685550014 or 685550014. Listed at 18 retailers as of November 4, 2026, with prices from $158 to $914, a $756 spread on the same certified stone. MOH London lists it at $914. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685550014
Dimensions6.94 × 6.90 × 4.21 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.94 mm6.90 mm1.23 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685550014
Side View
Table 58.0%Crown 33.4°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.8%

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: Nov 5
Current: $914 USD|Low: $152 USD|High: $973 USD|Avg: $407 USD|-6.0%
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
Retailer 17
November 6, 2026
Retailer 14$158 USD
Retailer 7$176 USD
Retailer 6$183 USD
Retailer 16$196 USD
Retailer 17$196 USD
Retailer 8$262 USD
Retailer 11$338 USD
Retailer 2$340 USD
Retailer 5$384 USD
Retailer 4$388 USD
Retailer 13$479 USD
Retailer 10$485 USD
Retailer 12$512 USD
Retailer 15$580 USD
Retailer 9$630 USD
Retailer 3$685 USD
MOH London$914 USD

44 data points across 17 retailers

18 retailers$158 USD to $914 USD

A
Cheapest Retailer
-
$158 USD
A
Retailer 2
-
$176 USD
View
Final sale: no returns
A
Retailer 3
-
$183 USD
View
A
Retailer 4
-
$196 USD
View
Retailer 5
-
$196 USD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$262 USD
View
A
Retailer 7
-
$338 USD
View
A
Retailer 8
-
$340 USD
View
A
Retailer 9
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$384 USD
View
B+
Retailer 10
-
$479 USD
View
Retailer 11
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$480 USD
View
Price last confirmed 16 days ago
B+
Retailer 12
-
$485 USD
View
B+
Retailer 13
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$512 USD
View
B+
Retailer 14
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$522 USD
View
B+
Retailer 15
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$580 USD
View
B
Retailer 16
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$630 USD
View
B
Retailer 17
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$685 USD
View
Most Expensive
B
MOH London
LG685550014 · Nov 4
$914 USD
£720 GBP
View
17 more retailers have this diamond
Prices start from $158 USDSave up to $756 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 Round
$158 USD