Round|Natural|GIA

1.03ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2497177228

Certificate GIA 2497177228

Diamond specifications and retailer prices

From £1,150 GBP
As of November 6, 2026
Save £1,199 GBP (51%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,207 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.03ct natural round diamond

This 1.03ct 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 GIA 2497177228. Listed at 13 retailers as of November 4, 2026, with a 104% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.03
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2497177228
Dimensions6.44 × 6.41 × 3.98 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.44 mm6.41 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2497177228
Side View
Table 58.0%Crown 36°Girdle: ThickPavilion 40.6°Culet: NoneDepth 62.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,641 GBP|Low: £1,112 GBP|High: £2,381 GBP|Avg: £1,602 GBP|+5.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£1,150 GBP
Retailer 7£1,225 GBP
Retailer 8£1,386 GBP
Retailer 6£1,447 GBP
Retailer 3£1,484 GBP
Retailer 1£1,641 GBP
Retailer 9£1,715 GBP
Retailer 2£1,823 GBP
Retailer 4£2,349 GBP

41 data points across 9 retailers

13 retailers£1,150 GBP to £2,349 GBP

A
Cheapest Retailer
-
£1,150 GBP
A
Retailer 2
-
£1,225 GBP
View
Retailer 3
-
£1,314 GBP
View
Price last confirmed 29 days ago
Retailer 4
-
£1,375 GBP
View
Price last confirmed 38 days ago
B+
Retailer 5
-
£1,386 GBP
View
B+
Retailer 6
-
£1,447 GBP
View
B+
Retailer 7
-
£1,484 GBP
View
Retailer 8
-
£1,517 GBP
View
Price last confirmed 38 days ago
B+
Retailer 9
-
£1,641 GBP
View
Retailer 10
-
£1,715 GBP
View
Price last confirmed 32 days ago
B
Retailer 11
-
£1,823 GBP
View
B
Retailer 12
-
£2,349 GBP
View
Most Expensive
NZ Jewellers
aacb12da-af33-44e7-8bc4-44ee2ea07698 · Sep 28
£3,207 GBP
$4,316 USD
View
Price last confirmed 39 days ago
12 more retailers have this diamond
Prices start from £1,150 GBPSave up to £1,199 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
1.03ct Round
£1,150 GBP