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Round|Natural|GIA

1.30ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6485801399

Certificate GIA 6485801399

Diamond specifications and retailer prices

From £2,533 GBP
As of November 1, 2026
Save £4,721 GBP (65%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £7,254 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6485801399. Listed at 20 retailers as of November 1, 2026, with prices from £2,533 to £7,254, a £4,721 spread on the same certified stone. Diamond Quarter lists it at £7,254. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6485801399
Dimensions6.91 × 6.94 × 4.35 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.91 mm6.94 mm1.30 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6485801399
Side View
Table 56.0%Crown 35.5°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 62.8%

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 1
Current: £2,956 GBP|Low: £2,533 GBP|High: £5,379 GBP|Avg: £3,425 GBP|-1.8%
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
November 6, 2026
Retailer 10£2,533 GBP
Retailer 11£2,597 GBP
Retailer 2£2,874 GBP
Retailer 3£2,907 GBP
Retailer 1£2,956 GBP
Retailer 4£3,019 GBP
Retailer 12£3,178 GBP
Retailer 8£3,203 GBP
Retailer 5£3,354 GBP
Retailer 6£3,407 GBP
Retailer 13£3,781 GBP
Retailer 7£4,641 GBP
Retailer 9£5,342 GBP

37 data points across 13 retailers

20 retailers£2,533 GBP to £7,254 GBP

A
Cheapest Retailer
-
£2,533 GBP
A
Retailer 2
-
£2,597 GBP
View
B+
Retailer 3
-
£2,874 GBP
View
B+
Retailer 4
-
£2,907 GBP
View
B+
Retailer 5
-
£2,956 GBP
View
B+
Retailer 6
-
£3,019 GBP
View
Retailer 7
-
£3,178 GBP
View
Price last confirmed 56 days ago
Retailer 8
-
£3,178 GBP
View
Price last confirmed 19 days ago
Retailer 9
-
£3,178 GBP
View
Price last confirmed 21 days ago
Retailer 10
-
£3,178 GBP
View
Price last confirmed 22 days ago
B+
Retailer 11
-
£3,203 GBP
View
B+
Retailer 12
-
£3,354 GBP
View
B+
Retailer 13
-
£3,407 GBP
View
Retailer 14
-
£3,667 GBP
View
Price last confirmed 60 days ago
Retailer 15
-
£3,667 GBP
View
Price last confirmed 19 days ago
B
Retailer 16
-
£4,641 GBP
View
Retailer 17
-
£5,342 GBP
View
Price last confirmed 8 days ago
Retailer 18
-
£5,536 GBP
View
Price last confirmed 57 days ago
Retailer 19
-
£5,536 GBP
View
Price last confirmed 20 days ago
Most Expensive
B
Diamond Quarter
1.3SI2H649971CEN · Nov 5
£7,254 GBP
View
19 more retailers have this diamond
Prices start from £2,533 GBPSave up to £4,721 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
1.30ct Round
£2,533 GBP