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Round|Natural|IGI

1.01ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 623457656

Shape and cutting style on the report: Round brilliant

Certificate IGI 623457656

Diamond specifications and retailer prices

From £872 GBP
$1,169 USD
As of October 30, 2026
Save £1,434 GBP (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,307 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.01ct natural round diamond

This 1.01ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 623457656. Listed at 15 retailers as of October 30, 2026, with prices from £872 to £2,307, a £1,434 spread on the same certified stone. NZ Jewellers lists it at £2,307. 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

1.01
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.4°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 623457656
Dimensions6.40 × 6.36 × 3.93 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.40 mm6.36 mm1.01 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 623457656
Side View
Table 59.0%Crown 36.4°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 61.6%

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: Oct 30
Current: £2,307 GBP|Low: £800 GBP|High: £2,307 GBP|Avg: £1,148 GBP
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
Retailer 15
October 30, 2026
Retailer 13£872 GBP
Retailer 11£899 GBP
Retailer 8£913 GBP
Retailer 3£946 GBP
Retailer 5£946 GBP
Retailer 14£982 GBP
Retailer 15£1,005 GBP
Retailer 12£1,014 GBP
Retailer 6£1,046 GBP
Retailer 4£1,091 GBP
Retailer 10£1,123 GBP
Retailer 7£1,125 GBP
Retailer 2£1,252 GBP
Retailer 9£1,742 GBP
NZ Jewellers£2,307 GBP

43 data points across 15 retailers

15 retailers£872 GBP to £2,307 GBP

A
Cheapest Retailer
-
£872 GBP
$1,169 USD
Final sale: no returns
Retailer 2
-
£899 GBP
$1,205 USD
View
Price last confirmed 10 days ago
A
Retailer 3
-
£906 GBP
$1,214 USD
View
A
Retailer 4
-
£913 GBP
View
A
Retailer 5
-
£946 GBP
$1,267 USD
View
A
Retailer 6
-
£946 GBP
$1,267 USD
View
A
Retailer 7
-
£982 GBP
$1,316 USD
View
A
Retailer 8
-
£1,005 GBP
$1,347 USD
View
A
Retailer 9
-
£1,014 GBP
$1,358 USD
View
A
Retailer 10
-
£1,046 GBP
$1,402 USD
View
B+
Retailer 11
-
£1,091 GBP
$1,462 USD
View
B+
Retailer 12
-
£1,123 GBP
View
B+
Retailer 13
-
£1,252 GBP
€1,598 EUR
View
B
Retailer 14
-
£1,742 GBP
View
Most Expensive
B
NZ Jewellers
1f95bea9-c9c5-410d-9912-8116841d46d3 · Oct 30
£2,307 GBP
$3,091 USD
View
14 more retailers have this diamond
Prices start from £872 GBPSave up to £1,434 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
1.01ct Round
£872 GBP