CaratHunter
Plans
Round|Natural|GIA

1.03ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 5242070995

Certificate GIA 5242070995

Diamond specifications and retailer prices

From £1,398 GBP
As of November 4, 2026
Save £1,675 GBP (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,073 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5242070995. Listed at 16 retailers as of November 4, 2026, with prices from £1,398 to £3,073, a £1,675 spread on the same certified stone. Helzberg Diamonds lists it at £3,073. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5242070995
Dimensions6.48 × 6.50 × 4.04 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.48 mm6.50 mm1.03 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5242070995
Side View
Table 56.0%Crown 34°Girdle: MediumPavilion 41.4°Culet: NoneDepth 62.2%

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 4
Current: £3,073 GBP|Low: £1,398 GBP|High: £3,132 GBP|Avg: £2,041 GBP|-1.9%
Helzberg Diamonds
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
November 6, 2026
Retailer 14£1,398 GBP
Retailer 10£1,606 GBP
Retailer 4£1,668 GBP
Retailer 16£1,668 GBP
Retailer 8£1,717 GBP
Retailer 7£1,746 GBP
Retailer 9£1,823 GBP
Retailer 6£1,867 GBP
Retailer 13£1,917 GBP
Retailer 5£2,122 GBP
Retailer 12£2,127 GBP
Retailer 2£2,151 GBP
Retailer 11£2,189 GBP
Retailer 15£2,614 GBP
Retailer 3£2,791 GBP
Helzberg Diamonds£3,073 GBP

25 data points across 16 retailers

16 retailers£1,398 GBP to £3,073 GBP

A
Cheapest Retailer
-
£1,398 GBP
A
Retailer 2
-
£1,606 GBP
View
A
Retailer 3
-
£1,668 GBP
View
A
Retailer 4
-
£1,668 GBP
View
A
Retailer 5
-
£1,717 GBP
View
A
Retailer 6
-
£1,746 GBP
View
A
Retailer 7
-
£1,823 GBP
View
A
Retailer 8
-
£1,867 GBP
View
B+
Retailer 9
-
£1,917 GBP
View
B+
Retailer 10
-
£2,122 GBP
View
B+
Retailer 11
-
£2,127 GBP
View
B+
Retailer 12
-
£2,151 GBP
View
B+
Retailer 13
-
£2,189 GBP
View
B+
Retailer 14
-
£2,614 GBP
View
B
Retailer 15
-
£2,791 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRLIKIGNGPPL · Nov 6
£3,073 GBP
$4,136 USD
View
15 more retailers have this diamond
Prices start from £1,398 GBPSave up to £1,675 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
£1,398 GBP