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Heart|Natural|IGI

1.31ct K SI2 Heart Natural Diamond

VG • K/SI2 • IGI 189553311

Shape and cutting style on the report: Heart brilliant

Certificate IGI 189553311

Diamond specifications and retailer prices

From £1,154 GBP
As of November 6, 2026
Save £983 GBP (46%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,137 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 189553311. Listed at 2 retailers as of November 1, 2026, with prices from £1,154 to £2,137, a £983 spread on the same certified stone. MOH London lists it at £2,137. 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

1.31
Carat
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
Crown angle40°
Pavilion angle39°
OriginNatural
Grading LabIGI
CertificateIGI 189553311
Dimensions6.73 × 7.67 × 4.24 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Top View
6.73 mm7.67 mm1.31 ctK / SI2
OriginNatural
CutVery Good
PolishGood
SymmetryGood
FluorescenceNone
CertificateIGI 189553311
Side View
Table 62.5%Crown 40°Girdle: MED-THKPavilion 39°Culet: NoneDepth 55.3%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £2,137 GBP|Low: £1,136 GBP|High: £2,162 GBP|Avg: £1,643 GBP
MOH London
Retailer 2
Retailer 3
November 1, 2026
Retailer 2£1,154 GBP
Retailer 3£1,627 GBP
MOH London£2,137 GBP

9 data points across 3 retailers

2 retailers£1,154 GBP to £2,137 GBP

B+
Cheapest Retailer
-
£1,154 GBP
Most Expensive
B
MOH London
12CC94641 · Nov 1
£2,137 GBP
View
1 more retailer has this diamond
Prices start from £1,154 GBPSave up to £983 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+
1.31ct Heart
£1,154 GBP