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Round|Natural|GIA

1.30ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6495897334

Certificate GIA 6495897334

Diamond specifications and retailer prices

From £3,452 GBP
As of November 4, 2026
Save £3,856 GBP (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £7,308 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6495897334. Listed at 16 retailers as of November 4, 2026, with prices from £3,452 to £7,308, a £3,856 spread on the same certified stone. NZ Jewellers lists it at £7,308. 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

1.30
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6495897334
Dimensions7.05 × 7.00 × 4.26 mm
L/W Ratio1.01
Top View
7.05 mm7.00 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6495897334
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £5,331 GBP|Low: £3,045 GBP|High: £6,516 GBP|Avg: £4,557 GBP|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 5£3,493 GBP
Retailer 7£3,654 GBP
Retailer 8£3,959 GBP
Retailer 3£4,193 GBP
Retailer 6£4,386 GBP
Retailer 2£4,737 GBP
Retailer 1£5,331 GBP
Retailer 4£6,421 GBP

44 data points across 8 retailers

16 retailers£3,452 GBP to £7,308 GBP

B+
Cheapest Retailer
-
£3,452 GBP
B+
Retailer 2
-
£3,493 GBP
View
B
Retailer 3
-
£3,654 GBP
View
Final sale: no returns
B+
Retailer 4
-
£3,916 GBP
View
Retailer 5
-
£3,959 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£3,959 GBP
View
B+
Retailer 7
-
£3,959 GBP
View
B
Retailer 8
-
£4,190 GBP
View
B+
Retailer 9
-
£4,193 GBP
View
Retailer 10
-
£4,386 GBP
View
Price last confirmed 23 days ago
B
Retailer 11
-
£4,568 GBP
View
B
Retailer 12
-
£4,737 GBP
View
Retailer 13
-
£4,820 GBP
View
Price last confirmed 14 days ago
B
Retailer 14
-
£5,331 GBP
View
B
Retailer 15
-
£6,421 GBP
View
Most Expensive
B
NZ Jewellers
2398afd0-7ebc-4eb4-9b25-20f0c5f827fc · Nov 5
£7,308 GBP
$9,782 USD
View
15 more retailers have this diamond
Prices start from £3,452 GBPSave up to £3,856 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.

B+
1.30ct Round
£3,452 GBP