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Heart|Natural|IGI

1.00ct J I1 Heart Natural Diamond

GD • J/I1 • IGI 578343737

Shape and cutting style on the report: Heart brilliant

Certificate IGI 578343737

Diamond specifications and retailer prices

From £763 GBP
$1,023 USD
As of November 1, 2026
Save £1,182 GBP (61%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,946 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1ct natural heart diamond

This 1ct natural heart sits in the classic one-carat band, graded J colour (near-colourless) and I1 clarity (included), with a standard cut grade and certified by IGI 578343737. Listed at 7 retailers as of October 30, 2026, with prices from £763 to £1,946, a £1,182 spread on the same certified stone. NZ Jewellers lists it at £1,946. 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
J
Colour
I1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
Crown angle43.8°
Pavilion angle33.5°
OriginNatural
Grading LabIGI
CertificateIGI 578343737
Dimensions6.45 × 6.69 × 3.67 mm
L/W Ratio1.04
Girdle conditionFaceted
Top View
6.45 mm6.69 mm1.00 ctJ / I1
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateIGI 578343737
Side View
Table 55.0%Crown 43.8°Girdle: THK-ETKPavilion 33.5°Culet: NoneDepth 56.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,946 GBP|Low: £604 GBP|High: £1,946 GBP|Avg: £968 GBP|+1.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 8£604 GBP
Retailer 6£763 GBP
Retailer 3£798 GBP
Retailer 5£798 GBP
Retailer 4£828 GBP
Retailer 7£920 GBP
Retailer 2£1,119 GBP
NZ Jewellers£1,946 GBP

16 data points across 8 retailers

7 retailers£763 GBP to £1,946 GBP

B+
Cheapest Retailer
-
£763 GBP
$1,023 USD
B+
Retailer 2
-
£798 GBP
$1,069 USD
View
B+
Retailer 3
-
£798 GBP
$1,069 USD
View
B+
Retailer 4
-
£828 GBP
$1,110 USD
View
B+
Retailer 5
-
£920 GBP
$1,233 USD
View
B+
Retailer 6
-
£1,119 GBP
€1,428 EUR
View
Most Expensive
C
NZ Jewellers
166d80e0-3a37-4f16-afa1-cb30f74726d0 · Oct 30
£1,946 GBP
$2,607 USD
View
6 more retailers have this diamond
Prices start from £763 GBPSave up to £1,182 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+
1.00ct Heart
£763 GBP