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Round|Natural|GIA

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1553091853

Certificate GIA 1553091853

Diamond specifications and retailer prices

From £1,726 GBP
As of November 6, 2026
Save £2,045 GBP (54%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £3,771 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1553091853. Listed at 7 retailers as of November 5, 2026, with prices from £1,726 to £3,771, a £2,045 spread on the same certified stone. NZ Jewellers lists it at £3,771. 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1553091853
Dimensions6.43 × 6.45 × 4.03 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Pinpoint
Top View
6.43 mm6.45 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553091853
Side View
Table 57.0%Crown 35.5°Girdle: MediumPavilion 41°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,726 GBP|Low: £1,724 GBP|High: £3,199 GBP|Avg: £2,187 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 1£1,726 GBP
Retailer 2£1,897 GBP
Retailer 6£2,036 GBP
Retailer 4£2,093 GBP
Retailer 3£2,201 GBP
Retailer 5£3,151 GBP

36 data points across 6 retailers

7 retailers£1,726 GBP to £3,771 GBP

B+
Cheapest Retailer
-
£1,726 GBP
B+
Retailer 2
-
£1,897 GBP
View
B
Retailer 3
-
£2,036 GBP
View
B+
Retailer 4
-
£2,093 GBP
View
B
Retailer 5
-
£2,201 GBP
View
B
Retailer 6
-
£3,151 GBP
View
Most Expensive
B
NZ Jewellers
64e19d28-db2e-4f84-b006-dd5af6c62b06 · Nov 5
£3,771 GBP
$5,076 USD
View
6 more retailers have this diamond
Prices start from £1,726 GBPSave up to £2,045 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.

B+
1.03ct Round
£1,726 GBP