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Heart|Lab Grown|IGI

1.25ct D SI1 Heart Lab Grown Diamond

VG • D/SI1 • IGI LG569329078

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG569329078

Diamond specifications and retailer prices

From £303 GBP
As of November 6, 2026
Save £1,165 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,468 GBP at MOH London · As of November 1, 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 D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG569329078 or 569329078. Listed at 11 retailers as of November 1, 2026, with prices from £303 to £1,468, a £1,165 spread on the same certified stone. MOH London lists it at £1,468. 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
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG569329078
Dimensions6.32 × 7.53 × 4.46 mm
L/W Ratio1.19
Girdle conditionFaceted
Culet sizePointed
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
6.32 mm7.53 mm1.25 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG569329078
Side View
Table 64.5%Crown 36.4°GirdlePavilion 40.7°Culet: NoneDepth 59.2%

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 6
Current: £1,468 GBP|Low: £291 GBP|High: £1,485 GBP|Avg: £718 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7£303 GBP
Retailer 6£339 GBP
Retailer 4£376 GBP
Retailer 2£447 GBP
Retailer 9£594 GBP
Retailer 3£611 GBP
Retailer 8£1,053 GBP
Retailer 5£1,207 GBP
MOH London£1,468 GBP

46 data points across 9 retailers

11 retailers£303 GBP to £1,468 GBP

B+
Cheapest Retailer
-
£303 GBP
B+
Retailer 2
-
£339 GBP
View
B+
Retailer 3
-
£376 GBP
View
B
Retailer 4
-
£408 GBP
View
B+
Retailer 5
-
£447 GBP
View
B
Retailer 6
-
£486 GBP
View
B
Retailer 7
-
£594 GBP
View
B
Retailer 8
-
£611 GBP
View
B
Retailer 9
-
£1,053 GBP
View
B
Retailer 10
-
£1,207 GBP
View
Most Expensive
B
MOH London
LG569329078 · Nov 1
£1,468 GBP
View
10 more retailers have this diamond
Prices start from £303 GBPSave up to £1,165 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
£303 GBP