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Round|Lab Grown|IGI

1.25ct I VS1 Round Lab Grown Diamond

ID • I/VS1 • IGI LG821638274

Shape and cutting style on the report: Round brilliant

Certificate IGI LG821638274

Diamond specifications and retailer prices

From £220 GBP
$295 USD
As of November 1, 2026
Save £517 GBP (70%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £737 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG821638274 or 821638274. Listed at 6 retailers as of November 1, 2026, with prices from £220 to £737, a £517 spread on the same certified stone. MOH London lists it at £737. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
I
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG821638274
Dimensions6.93 × 6.90 × 4.21 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.93 mm6.90 mm1.25 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG821638274
Side View
Table 58.0%Crown 33.7°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 60.8%

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: £737 GBP|Low: £220 GBP|High: £747 GBP|Avg: £462 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 3£220 GBP
Retailer 4£344 GBP
Retailer 2£387 GBP
Retailer 5£502 GBP
Retailer 6£548 GBP
MOH London£737 GBP

15 data points across 6 retailers

6 retailers£220 GBP to £737 GBP

B+
Cheapest Retailer
-
£220 GBP
$295 USD
A
Retailer 2
-
£344 GBP
$462 USD
View
A
Retailer 3
-
£387 GBP
$520 USD
View
B+
Retailer 4
-
£502 GBP
$674 USD
View
B+
Retailer 5
-
£548 GBP
$735 USD
View
Most Expensive
B+
MOH London
LG821638274 · Nov 1
£737 GBP
View
5 more retailers have this diamond
Prices start from £220 GBPSave up to £517 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
1.25ct Round
£220 GBP