CaratHunter
Plans
Round|Lab Grown|IGI

1.09ct K SI1 Round Lab Grown Diamond

ID • K/SI1 • IGI LG497157623

Shape and cutting style on the report: Round brilliant

Certificate IGI LG497157623

Diamond specifications and retailer prices

From £326 GBP
As of November 5, 2026
Save £1,161 GBP (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,487 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG497157623 or 497157623. Listed at 10 retailers as of November 3, 2026, with prices from £326 to £1,487, a £1,161 spread on the same certified stone. MOH London lists it at £1,487. 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

1.09
Carat
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG497157623
Dimensions6.66 × 6.69 × 4.04 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.66 mm6.69 mm1.09 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG497157623
Side View
Table 58.0%Crown 33.2°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 60.5%

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 5
Current: £1,487 GBP|Low: £314 GBP|High: £1,505 GBP|Avg: £741 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5£326 GBP
Retailer 6£405 GBP
Retailer 8£405 GBP
Retailer 3£513 GBP
Retailer 2£559 GBP
Retailer 7£635 GBP
Retailer 9£712 GBP
Retailer 4£1,088 GBP
MOH London£1,487 GBP

41 data points across 9 retailers

10 retailers£326 GBP to £1,487 GBP

A
Cheapest Retailer
-
£326 GBP
A
Retailer 2
-
£366 GBP
View
A
Retailer 3
-
£405 GBP
View
Retailer 4
-
£405 GBP
View
Price last confirmed 12 days ago
B+
Retailer 5
-
£513 GBP
View
A
Retailer 6
-
£559 GBP
View
B+
Retailer 7
-
£635 GBP
View
B
Retailer 8
-
£1,088 GBP
View
B
Retailer 9
-
£1,301 GBP
View
Most Expensive
B
MOH London
LG497157623 · Nov 3
£1,487 GBP
View
9 more retailers have this diamond
Prices start from £326 GBPSave up to £1,161 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
1.09ct Round
£326 GBP