Round|Natural|GIA

1.02ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2526780205

Certificate GIA 2526780205

Diamond specifications and retailer prices

From £1,417 GBP
As of November 4, 2026
Save £1,909 GBP (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,127 GBP at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.02ct natural round diamond

This 1.02ct 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 2526780205. Listed at 20 retailers as of November 4, 2026, with a 135% 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

1.02
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2526780205
Dimensions6.46 × 6.42 × 4.02 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.46 mm6.42 mm1.02 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2526780205
Side View
Table 58.0%Crown 34.5°Girdle: MD-STKPavilion 41.6°Culet: NoneDepth 62.4%

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: £3,979 GBP|Low: £1,407 GBP|High: £3,979 GBP|Avg: £2,168 GBP
NZ Jewellers
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
Retailer 15
Retailer 16
November 6, 2026
Retailer 13£1,417 GBP
Retailer 7£1,719 GBP
Retailer 12£1,720 GBP
Retailer 14£1,753 GBP
Retailer 15£1,756 GBP
Retailer 6£1,777 GBP
Retailer 5£1,904 GBP
Retailer 8£1,969 GBP
Retailer 2£2,002 GBP
Retailer 3£2,008 GBP
Retailer 16£2,132 GBP
Retailer 4£2,196 GBP
Retailer 10£2,323 GBP
Retailer 9£2,358 GBP
Retailer 11£3,326 GBP
NZ Jewellers£3,979 GBP

40 data points across 16 retailers

20 retailers£1,417 GBP to £3,326 GBP

A
Cheapest Retailer
-
£1,417 GBP
A
Retailer 2
-
£1,719 GBP
View
A
Retailer 3
-
£1,720 GBP
View
A
Retailer 4
-
£1,753 GBP
View
B+
Retailer 5
-
£1,756 GBP
View
Final sale: no returns
B+
Retailer 6
-
£1,777 GBP
View
Retailer 7
-
£1,904 GBP
View
Price last confirmed 21 days ago
Retailer 8
-
£1,904 GBP
View
Price last confirmed 15 days ago
Retailer 9
-
£1,969 GBP
View
Price last confirmed 10 days ago
Retailer 10
-
£1,991 GBP
View
Price last confirmed 22 days ago
B+
Retailer 11
-
£2,002 GBP
View
B+
Retailer 12
-
£2,008 GBP
View
Retailer 13
-
£2,132 GBP
View
Price last confirmed 30 days ago
Retailer 14
-
£2,196 GBP
View
Price last confirmed 16 days ago
Retailer 15
-
£2,278 GBP
View
Price last confirmed 45 days ago
B+
Retailer 16
-
£2,323 GBP
View
B+
Retailer 17
-
£2,358 GBP
View
B
Retailer 18
-
£3,326 GBP
View
Retailer 19
-
£3,979 GBP
View
Price last confirmed 17 days ago
Most Expensive
NZ Jewellers
81214d62-4064-46f1-8013-a28bef6db1be · Sep 19
£4,127 GBP
$5,555 USD
View
Price last confirmed 47 days ago
19 more retailers have this diamond
Prices start from £1,417 GBPSave up to £1,909 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
1.02ct Round
£1,417 GBP