Heart|Lab Grown|IGI

1.25ct H SI2 Heart Lab Grown Diamond

VG • H/SI2 • IGI LG651447951

Shape and cutting style on the report: Heart modified brilliant

Certificate IGI LG651447951

Diamond specifications and retailer prices

From £1,680 GBP
As of November 5, 2026
Save £629 GBP (27%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,262 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.25ct lab-grown heart diamond

This 1.25ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI LG651447951 or 651447951. Listed at 7 retailers as of November 5, 2026, with a 37% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.25
Carat
H
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.9°
Pavilion angle57.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG651447951
Dimensions6.71 × 6.78 × 3.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.71 mm6.78 mm1.25 ctH / SI2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG651447951
Side View
Table 61.0%Crown 37.9°Girdle: MED-STKPavilion 57.6°Culet: NoneDepth 46.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £3,262 GBP|Low: £1,234 GBP|High: £3,297 GBP|Avg: £2,206 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£1,234 GBP
Retailer 7£1,680 GBP
Retailer 6£1,716 GBP
Retailer 8£1,798 GBP
Retailer 2£1,828 GBP
Retailer 11£1,963 GBP
Retailer 3£2,152 GBP
Retailer 10£2,212 GBP
Retailer 5£2,309 GBP
Retailer 12£3,003 GBP
Retailer 9£3,078 GBP
MOH London£3,262 GBP

29 data points across 12 retailers

7 retailers£1,680 GBP to £2,309 GBP

B+
Cheapest Retailer
-
£1,680 GBP
B+
Retailer 2
-
£1,716 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,828 GBP
View
B+
Retailer 4
-
£1,963 GBP
View
B+
Retailer 5
-
£2,309 GBP
View
Retailer 6
-
£3,078 GBP
View
Price last confirmed 28 days ago
Most Expensive
MOH London
A46AED314 · Oct 26
£3,262 GBP
View
Price last confirmed 11 days ago
6 more retailers have this diamond
Prices start from £1,680 GBPSave up to £629 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+
1.25ct Heart
£1,680 GBP