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Heart|Natural|IGI

1.00ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 816643964

Shape and cutting style on the report: Heart brilliant

Certificate IGI 816643964

Diamond specifications and retailer prices

From £782 GBP
As of November 6, 2026
Save £1,518 GBP (66%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,300 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 816643964. Listed at 11 retailers as of November 5, 2026, with prices from £782 to £2,300, a £1,518 spread on the same certified stone. NZ Jewellers lists it at £2,300. 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

1.00
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.4°
Pavilion angle40.4°
OriginNatural
Grading LabIGI
CertificateIGI 816643964
Dimensions5.77 × 6.74 × 4.27 mm
L/W Ratio1.17
Girdle conditionFaceted
Top View
5.77 mm6.74 mm1.00 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 816643964
Side View
Table 57.0%Crown 39.4°Girdle: MED-THKPavilion 40.4°CuletDepth 63.4%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £2,300 GBP|Low: £782 GBP|High: £2,300 GBP|Avg: £1,225 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£782 GBP
Retailer 3£914 GBP
Retailer 5£943 GBP
Retailer 9£945 GBP
Retailer 8£979 GBP
Retailer 10£1,056 GBP
Retailer 4£1,089 GBP
Retailer 6£1,151 GBP
Retailer 7£1,723 GBP
NZ Jewellers£2,300 GBP

44 data points across 10 retailers

11 retailers£782 GBP to £2,300 GBP

A
Cheapest Retailer
-
£782 GBP
B+
Retailer 2
-
£914 GBP
View
B+
Retailer 3
-
£943 GBP
View
B+
Retailer 4
-
£945 GBP
View
B+
Retailer 5
-
£979 GBP
View
B+
Retailer 6
-
£1,044 GBP
View
B+
Retailer 7
-
£1,056 GBP
View
B+
Retailer 8
-
£1,089 GBP
View
B+
Retailer 9
-
£1,151 GBP
View
B
Retailer 10
-
£1,723 GBP
View
Most Expensive
C
NZ Jewellers
c8f7d190-9234-456a-88b7-f702d5630897 · Nov 5
£2,300 GBP
$3,079 USD
View
10 more retailers have this diamond
Prices start from £782 GBPSave up to £1,518 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
1.00ct Heart
£782 GBP