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Heart|Natural|HRD

1.55ct K SI1 Heart Natural Diamond

EX • K/SI1 • HRD 250000326462

Certificate HRD 250000326462

Diamond specifications and retailer prices

From £1,758 GBP
As of November 1, 2026
Save £1,918 GBP (52%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,676 GBP at NZ Jewellers · As of November 3, 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 top-tier cut grade stated by the retailer rather than the lab and certified by HRD 250000326462. Listed at 5 retailers as of November 1, 2026, with prices from £1,758 to £3,676, a £1,918 spread on the same certified stone. NZ Jewellers lists it at £3,676. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle37.48°
Pavilion angle42.26°
OriginNatural
Grading LabHRD
CertificateHRD 250000326462
Dimensions6.96 × 7.98 × 4.84 mm
L/W Ratio1.15
Girdle conditionMedium
Top View
6.96 mm7.98 mm1.55 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateHRD 250000326462
Side View
Table 63.0%Crown 37.48°GirdlePavilion 42.26°CuletDepth 60.7%

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 1
Current: £3,676 GBP|Low: £1,758 GBP|High: £3,731 GBP|Avg: £2,420 GBP|-1.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 3£1,758 GBP
Retailer 5£1,823 GBP
Retailer 4£1,839 GBP
Retailer 6£2,082 GBP
Retailer 2£3,080 GBP
NZ Jewellers£3,676 GBP

15 data points across 6 retailers

5 retailers£1,758 GBP to £3,676 GBP

A
Cheapest Retailer
-
£1,758 GBP
B+
Retailer 2
-
£1,823 GBP
View
B+
Retailer 3
-
£1,839 GBP
View
B+
Retailer 4
-
£3,080 GBP
View
Most Expensive
B
NZ Jewellers
c09f5359-d3ae-4d76-a80c-03d88b047577 · Nov 3
£3,676 GBP
$4,920 USD
View
4 more retailers have this diamond
Prices start from £1,758 GBPSave up to £1,918 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
£1,758 GBP