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1.23ct I VS1 Round Lab Grown Diamond

ID • I/VS1 • GCAL 291150189

Shape and cutting style on the report: Round brilliant

Certificate GCAL 291150189

Diamond specifications and retailer prices

From €363 EUR
$406 USD
As of November 1, 2026
Save €702 EUR (66%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €1,065 EUR at MOH London · As of November 1, 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 I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by GCAL 291150189. Listed at 4 retailers as of November 1, 2026, with prices from €363 to €1,065, a €702 spread on the same certified stone. MOH London lists it at €1,065. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
I
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabGCAL
CertificateGCAL 291150189
Dimensions6.90 × 6.88 × 4.21 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.90 mm6.88 mm1.23 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGCAL 291150189
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €1,065 EUR|Low: €323 EUR|High: €1,078 EUR|Avg: €682 EUR|+5.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2€363 EUR
Retailer 3€464 EUR
Retailer 4€887 EUR
MOH London€1,065 EUR

11 data points across 4 retailers

4 retailers€363 EUR to €1,065 EUR

A
Cheapest Retailer
-
€363 EUR
$406 USD
B+
Retailer 2
-
€464 EUR
$518 USD
View
B
Retailer 3
-
€887 EUR
$991 USD
View
Most Expensive
B
MOH London
291150189 · Nov 1
€1,065 EUR
£937 GBP
View
3 more retailers have this diamond
Prices start from €363 EURSave up to €702 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
€363 EUR