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1.23ct I VS1 Round Lab Grown Diamond

VG • I/VS1 • GCAL 291690187

Shape and cutting style on the report: Round brilliant

Certificate GCAL 291690187

Diamond specifications and retailer prices

From €363 EUR
$406 USD
As of November 1, 2026
Save €707 EUR (66%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: €1,071 EUR at MOH London · As of October 29, 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 very-good cut grade and certified by GCAL 291690187. Listed at 5 retailers as of October 29, 2026, with prices from €363 to €1,071, a €707 spread on the same certified stone. MOH London lists it at €1,071. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
I
Color
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginLab Grown
Grading LabGCAL
CertificateGCAL 291690187
Dimensions6.86 × 6.81 × 4.26 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.86 mm6.81 mm1.23 ctI / VS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGCAL 291690187
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €1,071 EUR|Low: €194 EUR|High: €1,078 EUR|Avg: €615 EUR|+6.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 18, 2026
Retailer 2€207 EUR
Retailer 3€363 EUR
Retailer 4€464 EUR
Retailer 5€887 EUR
MOH London€1,071 EUR

10 data points across 5 retailers

5 retailers€363 EUR to €1,071 EUR

Retailer 1
-
€207 EUR
$231 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
€363 EUR
$406 USD
View
B+
Retailer 3
-
€464 EUR
$518 USD
View
B
Retailer 4
-
€887 EUR
$991 USD
View
Most Expensive
B
MOH London
291690187 · Oct 29
€1,071 EUR
£942 GBP
View
4 more retailers have this diamond
Prices start from €363 EURSave up to €707 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.

B+
1.23ct Round
€363 EUR