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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2564476979

Certificate GIA 2564476979

Diamond specifications and retailer prices

From £1,293 GBP
As of November 6, 2026
Save £1,711 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £3,003 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2564476979. Listed at 14 retailers as of November 4, 2026, with prices from £1,293 to £3,003, a £1,711 spread on the same certified stone. MOH London lists it at £3,003. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2564476979
Dimensions6.41 × 6.36 × 3.96 mm
L/W Ratio1.01
Top View
6.41 mm6.36 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2564476979
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.0%

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 6
Current: £3,003 GBP|Low: £1,293 GBP|High: £3,238 GBP|Avg: £1,909 GBP|-7.3%
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
November 6, 2026
Retailer 3£1,293 GBP
Retailer 2£1,299 GBP
Retailer 12£1,553 GBP
Retailer 7£1,643 GBP
Retailer 10£1,719 GBP
Retailer 11£1,720 GBP
Retailer 4£1,822 GBP
Retailer 5£1,822 GBP
Retailer 6£1,857 GBP
Retailer 9£2,022 GBP
Retailer 8£2,097 GBP
Retailer 13£2,508 GBP
MOH London£3,003 GBP

22 data points across 13 retailers

14 retailers£1,293 GBP to £3,003 GBP

A
Cheapest Retailer
-
£1,293 GBP
A
Retailer 2
-
£1,299 GBP
View
A
Retailer 3
-
£1,553 GBP
View
A
Retailer 4
-
£1,643 GBP
View
A
Retailer 5
-
£1,719 GBP
View
B+
Retailer 6
-
£1,720 GBP
View
Retailer 7
-
£1,822 GBP
View
Price last confirmed 11 days ago
B+
Retailer 8
-
£1,822 GBP
View
B+
Retailer 9
-
£1,857 GBP
View
B+
Retailer 10
-
£2,022 GBP
View
Retailer 11
-
£2,087 GBP
View
Price last confirmed 33 days ago
B+
Retailer 12
-
£2,097 GBP
View
B+
Retailer 13
-
£2,508 GBP
View
Most Expensive
B
MOH London
50E22FE5A · Nov 4
£3,003 GBP
View
13 more retailers have this diamond
Prices start from £1,293 GBPSave up to £1,711 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
£1,293 GBP