CaratHunter
Plans
Round|Natural|HRD

1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • HRD 260000116770

Certificate HRD 260000116770

Diamond specifications and retailer prices

From £842 GBP
As of November 6, 2026
Save £1,891 GBP (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,733 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by HRD 260000116770. Listed at 15 retailers as of November 5, 2026, with prices from £842 to £2,733, a £1,891 spread on the same certified stone. NZ Jewellers lists it at £2,733. 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

1.00
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle40.8°
OriginNatural
Grading LabHRD
CertificateHRD 260000116770
Dimensions6.34 × 6.39 × 4.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.34 mm6.39 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 260000116770
Side View
Table 56.0%Crown 36.6°Girdle: MED-MEDPavilion 40.8°Culet: NoneDepth 62.9%

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: £2,733 GBP|Low: £842 GBP|High: £2,803 GBP|Avg: £1,406 GBP|-2.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 2£842 GBP
Retailer 9£1,027 GBP
Retailer 4£1,033 GBP
Retailer 12£1,048 GBP
Retailer 5£1,120 GBP
Retailer 13£1,172 GBP
Retailer 7£1,256 GBP
Retailer 3£1,293 GBP
Retailer 8£1,306 GBP
Retailer 11£1,461 GBP
Retailer 6£1,615 GBP
Retailer 14£1,849 GBP
Retailer 10£1,958 GBP
NZ Jewellers£2,733 GBP

34 data points across 14 retailers

15 retailers£842 GBP to £2,733 GBP

A
Cheapest Retailer
-
£842 GBP
A
Retailer 2
-
£1,027 GBP
View
A
Retailer 3
-
£1,033 GBP
View
Final sale: no returns
A
Retailer 4
-
£1,048 GBP
View
A
Retailer 5
-
£1,120 GBP
View
A
Retailer 6
-
£1,172 GBP
View
B+
Retailer 7
-
£1,250 GBP
View
A
Retailer 8
-
£1,256 GBP
View
B+
Retailer 9
-
£1,293 GBP
View
A
Retailer 10
-
£1,306 GBP
View
B+
Retailer 11
-
£1,461 GBP
View
B+
Retailer 12
-
£1,615 GBP
View
B
Retailer 13
-
£1,849 GBP
View
B
Retailer 14
-
£1,958 GBP
View
Most Expensive
B
NZ Jewellers
09ec0cc1-6dc2-4b6c-825e-9b34c40caf83 · Nov 5
£2,733 GBP
$3,678 USD
View
14 more retailers have this diamond
Prices start from £842 GBPSave up to £1,891 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 Round
£842 GBP