CaratHunter
Plans
Round|Lab Grown|GCAL

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 £303 GBP
$406 USD
As of November 1, 2026
Save £584 GBP (66%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £887 GBP at MOH London · As of November 2, 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 £303 to £887, a £584 spread on the same certified stone. MOH London lists it at £887. 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
Colour
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: £887 GBP|Low: £269 GBP|High: £897 GBP|Avg: £568 GBP|+5.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2£303 GBP
Retailer 3£386 GBP
Retailer 4£738 GBP
MOH London£887 GBP

11 data points across 4 retailers

4 retailers£303 GBP to £887 GBP

A
Cheapest Retailer
-
£303 GBP
$406 USD
B+
Retailer 2
-
£386 GBP
$518 USD
View
B
Retailer 3
-
£738 GBP
$991 USD
View
Most Expensive
B
MOH London
291150189 · Nov 2
£887 GBP
View
3 more retailers have this diamond
Prices start from £303 GBPSave up to £584 GBP

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
£303 GBP