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Round|Natural|GIA

1.00ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 2567270628

Certificate GIA 2567270628

Diamond specifications and retailer prices

From £1,331 GBP
As of November 6, 2026
Save £1,762 GBP (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,744 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2567270628. Listed at 19 retailers as of November 4, 2026, with a 132% 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

1.00
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2567270628
Dimensions6.40 × 6.38 × 4.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
6.40 mm6.38 mm1.00 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2567270628
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.6%

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: £1,331 GBP|Low: £1,331 GBP|High: £3,154 GBP|Avg: £1,809 GBP|-3.3%
Retailer 1
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 6, 2026
Retailer 1£1,331 GBP
Retailer 6£1,331 GBP
Retailer 5£1,499 GBP
Retailer 11£1,518 GBP
Retailer 14£1,549 GBP
Retailer 3£1,615 GBP
Retailer 10£1,624 GBP
Retailer 4£1,633 GBP
Retailer 7£1,694 GBP
Retailer 12£1,880 GBP
Retailer 9£2,028 GBP
Retailer 8£2,081 GBP
Retailer 2£2,570 GBP
Retailer 13£3,093 GBP

22 data points across 14 retailers

19 retailers£1,331 GBP to £3,093 GBP

A
Cheapest Retailer
-
£1,331 GBP
A
Retailer 2
-
£1,331 GBP
View
Retailer 3
-
£1,499 GBP
View
Price last confirmed 11 days ago
A
Retailer 4
-
£1,518 GBP
View
A
Retailer 5
-
£1,549 GBP
View
A
Retailer 6
-
£1,615 GBP
View
A
Retailer 7
-
£1,624 GBP
View
A
Retailer 8
-
£1,626 GBP
View
A
Retailer 9
-
£1,633 GBP
View
Final sale: no returns
A
Retailer 10
-
£1,694 GBP
View
Retailer 11
-
£1,791 GBP
View
Price last confirmed 19 days ago
A
Retailer 12
-
£1,880 GBP
View
Retailer 13
-
£1,895 GBP
View
Price last confirmed 22 days ago
A
Retailer 14
-
£2,028 GBP
View
Retailer 15
-
£2,066 GBP
View
Price last confirmed 19 days ago
B+
Retailer 16
-
£2,081 GBP
View
B+
Retailer 17
-
£2,570 GBP
View
B
Retailer 18
-
£3,093 GBP
View
Most Expensive
NZ Jewellers
70971cb7-2c63-445b-9832-600e7f6dc01d · Oct 17
£3,744 GBP
$5,039 USD
View
Price last confirmed 20 days ago
18 more retailers have this diamond
Prices start from £1,331 GBPSave up to £1,762 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
£1,331 GBP