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Round|Natural|GIA

1.30ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 6555956405

Certificate GIA 6555956405

Diamond specifications and retailer prices

From £3,563 GBP
As of November 5, 2026
Save £1,064 GBP (23%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £6,342 GBP at NZ Jewellers · As of October 6, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555956405. Listed at 12 retailers as of November 5, 2026, with a 30% 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

1.30
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6555956405
Dimensions6.96 × 7.01 × 4.36 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
6.96 mm7.01 mm1.30 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6555956405
Side View
Table 57.0%Crown 35°Girdle: MediumPavilion 41.4°Culet: NoneDepth 62.5%

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 5
Current: £6,342 GBP|Low: £3,228 GBP|High: £6,342 GBP|Avg: £3,856 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
November 5, 2026
Retailer 5£3,228 GBP
Retailer 13£3,307 GBP
Retailer 6£3,485 GBP
Retailer 10£3,563 GBP
Retailer 7£3,626 GBP
Retailer 3£3,766 GBP
Retailer 11£3,792 GBP
Retailer 12£3,792 GBP
Retailer 4£3,903 GBP
Retailer 9£3,954 GBP
Retailer 8£4,258 GBP
Retailer 14£4,375 GBP
Retailer 2£4,627 GBP
NZ Jewellers£6,342 GBP

18 data points across 14 retailers

12 retailers£3,563 GBP to £4,627 GBP

Retailer 1
-
£3,307 GBP
Price last confirmed 10 days ago
B+
Retailer 2
-
£3,563 GBP
View
B+
Retailer 3
-
£3,626 GBP
View
Retailer 4
-
£3,766 GBP
View
Price last confirmed 43 days ago
B+
Retailer 5
-
£3,792 GBP
View
Retailer 6
-
£3,792 GBP
View
Price last confirmed 15 days ago
Retailer 7
-
£3,903 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£3,954 GBP
View
B
Retailer 9
-
£4,258 GBP
View
B+
Retailer 10
-
£4,375 GBP
View
B+
Retailer 11
-
£4,627 GBP
View
Most Expensive
NZ Jewellers
6ef02b67-2e4e-49dd-9911-874591fbb2b6 · Oct 6
£6,342 GBP
$8,536 USD
View
Price last confirmed 31 days ago
11 more retailers have this diamond
Prices start from £3,563 GBPSave up to £1,064 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
£3,563 GBP