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Heart|Natural|IGI

1.20ct K SI1 Heart Natural Diamond

GD • K/SI1 • IGI 270787421

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI 270787421

Diamond specifications and retailer prices

From £856 GBP
As of November 6, 2026
Save £669 GBP (44%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,525 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural heart diamond

This 1.2ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI 270787421. Listed at 4 retailers as of November 4, 2026, with prices from £856 to £1,525, a £669 spread on the same certified stone. MOH London lists it at £1,525. 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

1.20
Carat
K
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceFaint
Crown angle39°
Pavilion angle32.8°
OriginNatural
Grading LabIGI
CertificateIGI 270787421
Dimensions6.50 × 5.65 × 3.93 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Top View
6.50 mm5.65 mm1.20 ctK / SI1
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceFaint
CertificateIGI 270787421
Side View
Table 54.5%Crown 39°Girdle: STK-VTKPavilion 32.8°Culet: NoneDepth 69.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £1,525 GBP|Low: £748 GBP|High: £1,548 GBP|Avg: £1,031 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5£748 GBP
Retailer 4£856 GBP
Retailer 3£957 GBP
Retailer 2£1,163 GBP
MOH London£1,525 GBP

40 data points across 5 retailers

4 retailers£856 GBP to £1,525 GBP

B+
Cheapest Retailer
-
£856 GBP
B+
Retailer 2
-
£957 GBP
View
B+
Retailer 3
-
£1,163 GBP
View
Most Expensive
B
MOH London
47E42449B · Nov 4
£1,525 GBP
View
3 more retailers have this diamond
Prices start from £856 GBPSave up to £669 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+
1.20ct Heart
£856 GBP