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Round|Natural|GIA

1.00ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2486841401

Certificate GIA 2486841401

Diamond specifications and retailer prices

From £1,017 GBP
As of November 4, 2026
Save £2,307 GBP (69%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,324 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2486841401. Listed at 19 retailers as of November 4, 2026, with prices from £1,017 to £3,324, a £2,307 spread on the same certified stone. NZ Jewellers lists it at £3,324. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle33.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2486841401
Dimensions6.41 × 6.38 × 3.98 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
6.41 mm6.38 mm1.00 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2486841401
Side View
Table 55.0%Crown 33.5°Girdle: ThickPavilion 41.2°Culet: NoneDepth 62.3%

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 4
Current: £1,286 GBP|Low: £1,007 GBP|High: £2,416 GBP|Avg: £1,482 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 12£1,017 GBP
Retailer 3£1,091 GBP
Retailer 2£1,258 GBP
Retailer 11£1,263 GBP
Retailer 1£1,286 GBP
Retailer 5£1,415 GBP
Retailer 4£1,426 GBP
Retailer 8£1,488 GBP
Retailer 7£1,504 GBP
Retailer 9£1,580 GBP
Retailer 6£1,743 GBP
Retailer 10£2,381 GBP

40 data points across 12 retailers

19 retailers£1,017 GBP to £3,324 GBP

A
Cheapest Retailer
-
£1,017 GBP
A
Retailer 2
-
£1,091 GBP
View
A
Retailer 3
-
£1,242 GBP
View
A
Retailer 4
-
£1,258 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,263 GBP
View
A
Retailer 6
-
£1,286 GBP
View
Retailer 7
-
£1,363 GBP
View
Price last confirmed 8 days ago
A
Retailer 8
-
£1,363 GBP
View
A
Retailer 9
-
£1,364 GBP
View
A
Retailer 10
-
£1,415 GBP
View
A
Retailer 11
-
£1,426 GBP
View
A
Retailer 12
-
£1,440 GBP
View
A
Retailer 13
-
£1,488 GBP
View
A
Retailer 14
-
£1,504 GBP
View
A
Retailer 15
-
£1,573 GBP
View
A
Retailer 16
-
£1,580 GBP
View
B+
Retailer 17
-
£1,743 GBP
View
B
Retailer 18
-
£2,381 GBP
View
Most Expensive
B
NZ Jewellers
d8db8af8-f61f-4148-a18a-e8705c5fc50d · Nov 5
£3,324 GBP
$4,474 USD
View
18 more retailers have this diamond
Prices start from £1,017 GBPSave up to £2,307 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
£1,017 GBP