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Round|Natural|IGI

0.98ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 818638647

Shape and cutting style on the report: Round brilliant

Certificate IGI 818638647

Diamond specifications and retailer prices

From £800 GBP
As of November 6, 2026
Save £1,620 GBP (67%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,420 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.98ct natural round diamond

This 0.98ct natural round sits in the just-under-one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 818638647. Listed at 13 retailers as of November 5, 2026, with prices from £800 to £2,420, a £1,620 spread on the same certified stone. NZ Jewellers lists it at £2,420. 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

0.98
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.4°
OriginNatural
Grading LabIGI
CertificateIGI 818638647
Dimensions6.26 × 6.32 × 3.95 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.26 mm6.32 mm0.98 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 818638647
Side View
Table 56.0%Crown 36.4°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 62.7%

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 6
Current: £2,420 GBP|Low: £800 GBP|High: £2,420 GBP|Avg: £1,322 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
November 6, 2026
Retailer 2£800 GBP
Retailer 4£915 GBP
Retailer 9£992 GBP
Retailer 10£1,038 GBP
Retailer 5£1,082 GBP
Retailer 3£1,092 GBP
Retailer 13£1,145 GBP
Retailer 11£1,148 GBP
Retailer 7£1,401 GBP
Retailer 8£1,453 GBP
Retailer 12£1,817 GBP
Retailer 6£2,357 GBP
NZ Jewellers£2,420 GBP

14 data points across 13 retailers

13 retailers£800 GBP to £2,420 GBP

A
Cheapest Retailer
-
£800 GBP
A
Retailer 2
-
£915 GBP
View
Final sale: no returns
B+
Retailer 3
-
£992 GBP
View
B+
Retailer 4
-
£1,038 GBP
View
B+
Retailer 5
-
£1,082 GBP
View
B+
Retailer 6
-
£1,092 GBP
View
B+
Retailer 7
-
£1,145 GBP
View
B+
Retailer 8
-
£1,148 GBP
View
B+
Retailer 9
-
£1,401 GBP
View
B
Retailer 10
-
£1,453 GBP
View
B
Retailer 11
-
£1,817 GBP
View
B
Retailer 12
-
£2,357 GBP
View
Most Expensive
B
NZ Jewellers
361cc30a-026b-4e91-ae08-305eea2c7bad · Nov 5
£2,420 GBP
$3,257 USD
View
12 more retailers have this diamond
Prices start from £800 GBPSave up to £1,620 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
0.98ct Round
£800 GBP