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Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2239108432

Certificate GIA 2239108432

Diamond specifications and retailer prices

From £1,237 GBP
As of November 6, 2026
Save £1,977 GBP (62%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,214 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct 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 2239108432. Listed at 20 retailers as of November 5, 2026, with prices from £1,237 to £3,214, a £1,977 spread on the same certified stone. NZ Jewellers lists it at £3,214. 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

1.00
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2239108432
Dimensions6.39 × 6.33 × 4.02 mm
L/W Ratio1.01
Top View
6.39 mm6.33 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2239108432
Side View
Table 55.0%Crown 35°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.2%

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 6
Current: £1,797 GBP|Low: £1,237 GBP|High: £2,726 GBP|Avg: £1,711 GBP|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 2£1,237 GBP
Retailer 10£1,269 GBP
Retailer 8£1,289 GBP
Retailer 3£1,430 GBP
Retailer 11£1,457 GBP
Retailer 9£1,605 GBP
Retailer 6£1,660 GBP
Retailer 1£1,797 GBP
Retailer 5£1,876 GBP
Retailer 4£1,948 GBP
Retailer 7£2,686 GBP

41 data points across 11 retailers

20 retailers£1,237 GBP to £3,214 GBP

A
Cheapest Retailer
-
£1,237 GBP
A
Retailer 2
-
£1,254 GBP
View
A
Retailer 3
-
£1,269 GBP
View
A
Retailer 4
-
£1,289 GBP
View
B+
Retailer 5
-
£1,308 GBP
View
B+
Retailer 6
-
£1,343 GBP
View
Retailer 7
-
£1,393 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£1,393 GBP
View
B+
Retailer 9
-
£1,430 GBP
View
B+
Retailer 10
-
£1,457 GBP
View
B+
Retailer 11
-
£1,605 GBP
View
Retailer 12
-
£1,605 GBP
View
Price last confirmed 28 days ago
Retailer 13
-
£1,605 GBP
View
Price last confirmed 8 days ago
B+
Retailer 14
-
£1,607 GBP
View
B+
Retailer 15
-
£1,660 GBP
View
B
Retailer 16
-
£1,797 GBP
View
B+
Retailer 17
-
£1,876 GBP
View
B+
Retailer 18
-
£1,948 GBP
View
B
Retailer 19
-
£2,686 GBP
View
Most Expensive
B
NZ Jewellers
968c877d-6101-4c10-8795-2a9be30a4d4a · Nov 5
£3,214 GBP
$4,326 USD
View
19 more retailers have this diamond
Prices start from £1,237 GBPSave up to £1,977 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
1.00ct Round
£1,237 GBP