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Heart|Natural|IGI

0.90ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 818638390

Shape and cutting style on the report: Heart brilliant

Certificate IGI 818638390

Diamond specifications and retailer prices

From £583 GBP
As of November 6, 2026
Save £1,665 GBP (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,248 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.9ct natural heart diamond

This 0.9ct natural heart sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 818638390. Listed at 12 retailers as of November 5, 2026, with prices from £583 to £2,248, a £1,665 spread on the same certified stone. NZ Jewellers lists it at £2,248. 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

0.90
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 818638390
Dimensions5.86 × 6.43 × 4.10 mm
L/W Ratio1.10
Girdle conditionFaceted
Top View
5.86 mm6.43 mm0.90 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 818638390
Side View
Table 57.0%Crown 39.7°Girdle: STK-THKPavilion 40.5°Culet: NoneDepth 63.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,248 GBP|Low: £583 GBP|High: £2,248 GBP|Avg: £984 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2£583 GBP
Retailer 6£716 GBP
Retailer 10£717 GBP
Retailer 8£744 GBP
Retailer 5£827 GBP
Retailer 4£1,026 GBP
Retailer 7£1,050 GBP
Retailer 9£1,311 GBP
Retailer 3£1,372 GBP
NZ Jewellers£2,248 GBP

39 data points across 10 retailers

12 retailers£583 GBP to £2,248 GBP

A
Cheapest Retailer
-
£583 GBP
B+
Retailer 2
-
£716 GBP
View
B+
Retailer 3
-
£717 GBP
View
B+
Retailer 4
-
£744 GBP
View
B+
Retailer 5
-
£816 GBP
View
B+
Retailer 6
-
£827 GBP
View
B+
Retailer 7
-
£836 GBP
View
B
Retailer 8
-
£1,026 GBP
View
B
Retailer 9
-
£1,050 GBP
View
B
Retailer 10
-
£1,311 GBP
View
B
Retailer 11
-
£1,372 GBP
View
Most Expensive
C
NZ Jewellers
44d00f5c-79bb-4548-a36f-0451d9eb35a0 · Nov 5
£2,248 GBP
$3,009 USD
View
11 more retailers have this diamond
Prices start from £583 GBPSave up to £1,665 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.

A
0.90ct Heart
£583 GBP