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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 €141 EUR
As of November 5, 2026
Save €674 EUR (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €815 EUR 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 €141 to €815, a €674 spread on the same certified stone. MOH London lists it at €815. 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
Colour
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

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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: Nov 5
Current: €815 EUR|Low: €135 EUR|High: €867 EUR|Avg: €362 EUR|-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€141 EUR
Retailer 7€157 EUR
Retailer 6€163 EUR
Retailer 16€175 EUR
Retailer 17€175 EUR
Retailer 8€233 EUR
Retailer 2€300 EUR
Retailer 10€303 EUR
Retailer 5€342 EUR
Retailer 4€346 EUR
Retailer 13€427 EUR
Retailer 11€432 EUR
Retailer 12€456 EUR
Retailer 15€517 EUR
Retailer 9€561 EUR
Retailer 3€610 EUR
MOH London€815 EUR

44 data points across 17 retailers

18 retailers€141 EUR to €815 EUR

A
Cheapest Retailer
-
€141 EUR
A
Retailer 2
-
€157 EUR
View
Final sale: no returns
A
Retailer 3
-
€163 EUR
View
A
Retailer 4
-
€175 EUR
View
Retailer 5
-
€175 EUR
View
Price last confirmed 12 days ago
B+
Retailer 6
-
€233 EUR
View
A
Retailer 7
-
€300 EUR
View
A
Retailer 8
-
€303 EUR
View
A
Retailer 9
-
€342 EUR
View
B+
Retailer 10
-
€427 EUR
View
Retailer 11
-
€428 EUR
View
Price last confirmed 16 days ago
B+
Retailer 12
-
€432 EUR
View
B+
Retailer 13
-
€456 EUR
View
B+
Retailer 14
-
€465 EUR
View
B+
Retailer 15
-
€517 EUR
View
B
Retailer 16
-
€561 EUR
View
B
Retailer 17
-
€610 EUR
View
Most Expensive
B
MOH London
LG685550014 · Nov 4
€815 EUR
£720 GBP
View
17 more retailers have this diamond
Prices start from €141 EURSave up to €674 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 Round
€141 EUR