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Round|Lab Grown|IGI

1.22ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG445036609

Shape and cutting style on the report: Round brilliant

Certificate IGI LG445036609

Diamond specifications and retailer prices

From £446 GBP
As of November 5, 2026
Save £2,977 GBP (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,422 GBP at MOH London · As of November 3, 2026
View at MOH London

About this 1.22ct lab-grown round diamond

This 1.22ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG445036609 or 445036609. Listed at 13 retailers as of November 3, 2026, with prices from £446 to £3,422, a £2,977 spread on the same certified stone. MOH London lists it at £3,422. 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

1.22
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG445036609
Dimensions6.89 × 6.93 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.89 mm6.93 mm1.22 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG445036609
Side View
Table 59.0%Crown 32°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.3%

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: £3,422 GBP|Low: £446 GBP|High: £3,464 GBP|Avg: £1,730 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 5, 2026
Retailer 8£446 GBP
Retailer 10£1,033 GBP
Retailer 14£1,124 GBP
Retailer 3£1,157 GBP
Retailer 11£1,198 GBP
Retailer 13£1,198 GBP
Retailer 4£1,326 GBP
Retailer 2£1,559 GBP
Retailer 5£1,629 GBP
Retailer 12£1,892 GBP
Retailer 9£2,047 GBP
Retailer 6£2,175 GBP
Retailer 15£2,246 GBP
MOH London£3,422 GBP
Retailer 7£3,430 GBP

39 data points across 15 retailers

13 retailers£446 GBP to £3,422 GBP

A
Cheapest Retailer
-
£446 GBP
B+
Retailer 2
-
£1,033 GBP
View
B+
Retailer 3
-
£1,124 GBP
View
B+
Retailer 4
-
£1,157 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,198 GBP
View
Retailer 6
-
£1,198 GBP
View
Price last confirmed 25 days ago
B
Retailer 7
-
£1,326 GBP
View
B+
Retailer 8
-
£1,559 GBP
View
B
Retailer 9
-
£1,892 GBP
View
Retailer 10
-
£2,047 GBP
View
Price last confirmed 8 days ago
B
Retailer 11
-
£2,175 GBP
View
B
Retailer 12
-
£2,246 GBP
View
Most Expensive
B
MOH London
LG445036609 · Nov 3
£3,422 GBP
View
12 more retailers have this diamond
Prices start from £446 GBPSave up to £2,977 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
1.22ct Round
£446 GBP