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Heart|Lab Grown|IGI

1.22ct H SI2 Heart Lab Grown Diamond

VG • H/SI2 • IGI LG654475450

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG654475450

Diamond specifications and retailer prices

From £1,741 GBP
As of November 5, 2026
Save £307 GBP (15%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,409 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.22ct lab-grown heart diamond

This 1.22ct lab-grown heart sits in the classic one-carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG654475450 or 654475450. Listed at 5 retailers as of November 5, 2026, with a relatively tight 18% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

1.22
Carat
H
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.1°
Pavilion angle37.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG654475450
Dimensions6.57 × 7.44 × 4.15 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Top View
6.57 mm7.44 mm1.22 ctH / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG654475450
Side View
Table 66.0%Crown 42.1°Girdle: MED-STKPavilion 37.1°Culet: NoneDepth 55.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,409 GBP|Low: £1,290 GBP|High: £5,000 GBP|Avg: £2,529 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
November 6, 2026
Retailer 4£1,290 GBP
Retailer 6£1,741 GBP
Retailer 5£1,793 GBP
Retailer 7£1,858 GBP
Retailer 2£1,910 GBP
Retailer 10£2,048 GBP
Retailer 9£2,312 GBP
Retailer 12£2,371 GBP
Retailer 3£3,139 GBP
Retailer 8£3,216 GBP
MOH London£3,409 GBP
Retailer 11£5,000 GBP

26 data points across 12 retailers

5 retailers£1,741 GBP to £2,048 GBP

B
Cheapest Retailer
-
£1,741 GBP
B
Retailer 2
-
£1,793 GBP
View
Final sale: no returns
B
Retailer 3
-
£1,910 GBP
View
B
Retailer 4
-
£2,048 GBP
View
Most Expensive
MOH London
3766EC76C · Oct 26
£3,409 GBP
View
Price last confirmed 11 days ago
4 more retailers have this diamond
Prices start from £1,741 GBPSave up to £307 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.

B
1.22ct Heart
£1,741 GBP