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Round|Natural|GIA

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1246109498

Certificate GIA 1246109498

Diamond specifications and retailer prices

From £1,343 GBP
As of November 4, 2026
Save £981 GBP (42%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,323 GBP at Wholesale Diamonds Direct · As of November 4, 2026
View at Wholesale Diamonds Direct

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1246109498. Listed at 12 retailers as of November 4, 2026, with prices from £1,343 to £2,323, a £981 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,323. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1246109498
Dimensions6.49 × 6.46 × 4.03 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.49 mm6.46 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1246109498
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NDepth 62.1%

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: £1,557 GBP|Low: £1,343 GBP|High: £2,323 GBP|Avg: £1,667 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Wholesale Diamonds Direct
November 6, 2026
Retailer 3£1,343 GBP
Retailer 9£1,418 GBP
Retailer 10£1,421 GBP
Retailer 8£1,433 GBP
Retailer 1£1,557 GBP
Retailer 2£1,561 GBP
Retailer 5£1,798 GBP
Retailer 6£1,811 GBP
Retailer 11£1,828 GBP
Retailer 4£2,002 GBP
Retailer 7£2,184 GBP
Wholesale Diamonds Direct£2,323 GBP

9 data points across 12 retailers

12 retailers£1,343 GBP to £2,323 GBP

A
Cheapest Retailer
-
£1,343 GBP
B+
Retailer 2
-
£1,418 GBP
View
B+
Retailer 3
-
£1,421 GBP
View
B+
Retailer 4
-
£1,433 GBP
View
B+
Retailer 5
-
£1,557 GBP
View
B+
Retailer 6
-
£1,561 GBP
View
B
Retailer 7
-
£1,798 GBP
View
B
Retailer 8
-
£1,811 GBP
View
B
Retailer 9
-
£1,828 GBP
View
B
Retailer 10
-
£2,002 GBP
View
B
Retailer 11
-
£2,184 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
636229874 · Nov 4
£2,323 GBP
$3,127 USD
View
11 more retailers have this diamond
Prices start from £1,343 GBPSave up to £981 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
£1,343 GBP