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Heart|Natural|IGI

1.55ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 602363605

Shape and cutting style on the report: Heart brilliant

Certificate IGI 602363605

Diamond specifications and retailer prices

From £1,295 GBP
As of November 5, 2026
Save £1,188 GBP (48%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,466 GBP at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.55ct natural heart diamond

This 1.55ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 602363605. Listed at 16 retailers as of November 4, 2026, with a 92% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.55
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.9°
Pavilion angle36.5°
OriginNatural
Grading LabIGI
CertificateIGI 602363605
Dimensions7.37 × 7.89 × 4.41 mm
L/W Ratio1.07
Girdle conditionFaceted
Culet sizePointed
Top View
7.37 mm7.89 mm1.55 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 602363605
Side View
Table 56.0%Crown 36.9°Girdle: STK-VTKPavilion 36.5°Culet: NoneDepth 55.9%

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 5
Current: £1,378 GBP|Low: £1,377 GBP|High: £2,519 GBP|Avg: £1,662 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1£1,378 GBP
Retailer 7£1,389 GBP
Retailer 6£1,421 GBP
Retailer 5£1,487 GBP
Retailer 2£1,570 GBP
Retailer 3£1,734 GBP
Retailer 4£2,483 GBP

45 data points across 7 retailers

16 retailers£1,295 GBP to £2,483 GBP

A
Cheapest Retailer
-
£1,295 GBP
A
Retailer 2
-
£1,378 GBP
View
B+
Retailer 3
-
£1,389 GBP
View
Retailer 4
-
£1,421 GBP
View
Price last confirmed 53 days ago
Retailer 5
-
£1,421 GBP
View
Price last confirmed 12 days ago
Retailer 6
-
£1,421 GBP
View
Price last confirmed 38 days ago
Retailer 7
-
£1,421 GBP
View
Price last confirmed 29 days ago
B+
Retailer 8
-
£1,457 GBP
View
B+
Retailer 9
-
£1,487 GBP
View
B+
Retailer 10
-
£1,523 GBP
View
B+
Retailer 11
-
£1,570 GBP
View
Retailer 12
-
£1,639 GBP
View
Price last confirmed 38 days ago
B+
Retailer 13
-
£1,734 GBP
View
Retailer 14
-
£1,797 GBP
View
Price last confirmed 48 days ago
B+
Retailer 15
-
£2,483 GBP
View
Most Expensive
NZ Jewellers
edfcf161-9590-4412-b300-0dc6c2c1443c · Sep 29
£3,466 GBP
$4,639 USD
View
Price last confirmed 37 days ago
15 more retailers have this diamond
Prices start from £1,295 GBPSave up to £1,188 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
1.55ct Heart
£1,295 GBP