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Radiant|Natural|GIA

1.30ct H SI1 Radiant Natural Diamond

GD • H/SI1 • GIA 3545066102

Certificate GIA 3545066102

Diamond specifications and retailer prices

From £2,433 GBP
As of November 6, 2026
Save £241 GBP (9%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £2,675 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.3ct natural radiant diamond

This 1.3ct natural radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 3545066102. Listed at 5 retailers as of November 5, 2026, with a relatively tight 10% spread, which is unusual at this carat range and suggests competitive pricing across the listings. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.30
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.6°
Pavilion angle61.1°
OriginNatural
Grading LabGIA
CertificateGIA 3545066102
Dimensions7.03 × 5.52 × 3.81 mm
L/W Ratio1.27
Girdle conditionFaceted
Culet sizeNone
Cert comments
Additional clouds, pinpoints and internal graining are not shown.
Key to symbols
Cloud, Feather, Cavity, Crystal, Indented Natural, Natural
Top View
7.03 mm5.52 mm1.30 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545066102
Side View
Table 67.0%Crown 48.6°Girdle: THK-VTKPavilion 61.1°Culet: NoneDepth 69.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,675 GBP|Low: £2,415 GBP|High: £3,377 GBP|Avg: £2,783 GBP|-2.0%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 5£2,433 GBP
Retailer 3£2,573 GBP
Retailer 4£2,592 GBP
Retailer 2£2,624 GBP
Blue Nile£2,675 GBP
Retailer 6£3,265 GBP
Retailer 7£3,377 GBP

40 data points across 7 retailers

5 retailers£2,433 GBP to £2,675 GBP

A
Cheapest Retailer
-
£2,433 GBP
B+
Retailer 2
-
£2,573 GBP
View
B+
Retailer 3
-
£2,592 GBP
View
B+
Retailer 4
-
£2,624 GBP
View
Most Expensive
B+
Blue Nile
30300523 · Nov 5
£2,675 GBP
$3,580 USD
View
4 more retailers have this diamond
Prices start from £2,433 GBPSave up to £241 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 Radiant
£2,433 GBP