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Round|Natural|GIA

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1568676821

Certificate GIA 1568676821

Diamond specifications and retailer prices

From £1,074 GBP
As of November 1, 2026
Save £886 GBP (45%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,537 GBP at MOH London · As of October 29, 2026
View at MOH London

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 1568676821. Listed at 14 retailers as of November 1, 2026, with a 82% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1568676821
Dimensions6.49 × 6.44 × 4.02 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
6.49 mm6.44 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1568676821
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
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 1
Current: £2,537 GBP|Low: £1,065 GBP|High: £2,537 GBP|Avg: £1,562 GBP|+0.4%
MOH London
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
November 2, 2026
Retailer 12£1,074 GBP
Retailer 10£1,135 GBP
Retailer 9£1,386 GBP
Retailer 13£1,386 GBP
Retailer 5£1,441 GBP
Retailer 11£1,441 GBP
Retailer 6£1,441 GBP
Retailer 3£1,500 GBP
Retailer 7£1,508 GBP
Retailer 4£1,661 GBP
Retailer 8£1,662 GBP
Retailer 14£1,771 GBP
Retailer 2£1,960 GBP
MOH London£2,537 GBP

10 data points across 14 retailers

14 retailers£1,074 GBP to £1,960 GBP

A
Cheapest Retailer
-
£1,074 GBP
A
Retailer 2
-
£1,135 GBP
View
B+
Retailer 3
-
£1,386 GBP
View
B+
Retailer 4
-
£1,386 GBP
View
Retailer 5
-
£1,441 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£1,441 GBP
View
B+
Retailer 7
-
£1,441 GBP
View
Retailer 8
-
£1,500 GBP
View
Price last confirmed 11 days ago
B+
Retailer 9
-
£1,508 GBP
View
B+
Retailer 10
-
£1,661 GBP
View
B+
Retailer 11
-
£1,662 GBP
View
B
Retailer 12
-
£1,771 GBP
View
B
Retailer 13
-
£1,960 GBP
View
Most Expensive
MOH London
24D13D8A2 · Oct 29
£2,537 GBP
View
Price last confirmed 8 days ago
13 more retailers have this diamond
Prices start from £1,074 GBPSave up to £886 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
£1,074 GBP