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Round|Natural|GIA

1.03ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1323995271

Certificate GIA 1323995271

Diamond specifications and retailer prices

From £1,132 GBP
As of November 6, 2026
Save £2,044 GBP (64%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,176 GBP at NZ Jewellers · As of November 5, 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 1323995271. Listed at 19 retailers as of November 5, 2026, with prices from £1,132 to £3,176, a £2,044 spread on the same certified stone. NZ Jewellers lists it at £3,176. 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
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1323995271
Dimensions6.44 × 6.42 × 4.04 mm
L/W Ratio1.00
Key to symbols
Crystal, Feather, Needle
Top View
6.44 mm6.42 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1323995271
Side View
Table 58.0%CrownGirdle: Sli. ThickPavilionCulet: NoneDepth 62.8%

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: £3,176 GBP|Low: £1,094 GBP|High: £3,632 GBP|Avg: £1,670 GBP|-12.6%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 18£1,132 GBP
Retailer 19£1,219 GBP
Retailer 6£1,372 GBP
Retailer 12£1,380 GBP
Retailer 20£1,402 GBP
Retailer 2£1,433 GBP
Retailer 10£1,455 GBP
Retailer 9£1,516 GBP
Retailer 4£1,519 GBP
Retailer 11£1,519 GBP
Retailer 8£1,542 GBP
Retailer 13£1,567 GBP
Retailer 7£1,589 GBP
Retailer 3£1,621 GBP
Retailer 14£1,631 GBP
Retailer 5£1,753 GBP
Retailer 16£1,854 GBP
Retailer 15£2,057 GBP
Retailer 17£2,654 GBP
NZ Jewellers£3,176 GBP

33 data points across 20 retailers

19 retailers£1,132 GBP to £3,176 GBP

A
Cheapest Retailer
-
£1,132 GBP
A
Retailer 2
-
£1,219 GBP
View
B+
Retailer 3
-
£1,372 GBP
View
B+
Retailer 4
-
£1,402 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,433 GBP
View
B+
Retailer 6
-
£1,455 GBP
View
B+
Retailer 7
-
£1,516 GBP
View
Retailer 8
-
£1,519 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,519 GBP
View
B+
Retailer 10
-
£1,542 GBP
View
B+
Retailer 11
-
£1,567 GBP
View
B+
Retailer 12
-
£1,589 GBP
View
B+
Retailer 13
-
£1,621 GBP
View
B+
Retailer 14
-
£1,631 GBP
View
B
Retailer 15
-
£1,753 GBP
View
B
Retailer 16
-
£1,854 GBP
View
B
Retailer 17
-
£2,057 GBP
View
B
Retailer 18
-
£2,654 GBP
View
Most Expensive
B
NZ Jewellers
e7877a19-59e1-48f1-b0cc-a4a31e5e3b8e · Nov 5
£3,176 GBP
$4,274 USD
View
18 more retailers have this diamond
Prices start from £1,132 GBPSave up to £2,044 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
£1,132 GBP