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Round|Natural|GIA

1.30ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1567180831

Certificate GIA 1567180831

Diamond specifications and retailer prices

From £2,180 GBP
As of November 6, 2026
Save £2,654 GBP (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £5,036 GBP at NZ Jewellers · As of September 21, 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 1567180831. Listed at 20 retailers as of November 2, 2026, with a 122% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 1567180831
Dimensions6.89 × 6.94 × 4.38 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.89 mm6.94 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1567180831
Side View
Table 57.0%Crown 34.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 63.3%

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 6
Current: £2,255 GBP|Low: £2,180 GBP|High: £4,892 GBP|Avg: £3,089 GBP|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11£2,180 GBP
Retailer 1£2,255 GBP
Retailer 6£2,543 GBP
Retailer 2£2,668 GBP
Retailer 4£2,749 GBP
Retailer 8£2,909 GBP
Retailer 9£3,002 GBP
Retailer 3£3,096 GBP
Retailer 7£3,361 GBP
Retailer 5£3,528 GBP
Retailer 10£4,834 GBP

34 data points across 11 retailers

20 retailers£2,180 GBP to £4,834 GBP

A
Cheapest Retailer
-
£2,180 GBP
A
Retailer 2
-
£2,255 GBP
View
A
Retailer 3
-
£2,543 GBP
View
A
Retailer 4
-
£2,654 GBP
View
A
Retailer 5
-
£2,656 GBP
View
A
Retailer 6
-
£2,668 GBP
View
Final sale: no returns
B+
Retailer 7
-
£2,749 GBP
View
Retailer 8
-
£2,891 GBP
View
Price last confirmed 17 days ago
Retailer 9
-
£2,891 GBP
View
Price last confirmed 44 days ago
Retailer 10
-
£2,891 GBP
View
Price last confirmed 21 days ago
B+
Retailer 11
-
£2,899 GBP
View
B+
Retailer 12
-
£2,909 GBP
View
B+
Retailer 13
-
£3,000 GBP
View
B+
Retailer 14
-
£3,002 GBP
View
Retailer 15
-
£3,096 GBP
View
Price last confirmed 29 days ago
Retailer 16
-
£3,335 GBP
View
Price last confirmed 45 days ago
B+
Retailer 17
-
£3,361 GBP
View
B+
Retailer 18
-
£3,528 GBP
View
B
Retailer 19
-
£4,834 GBP
View
Most Expensive
NZ Jewellers
c4e5f4f4-57b6-4a17-9f38-eefb5c955d35 · Sep 21
£5,036 GBP
$6,741 USD
View
Price last confirmed 46 days ago
19 more retailers have this diamond
Prices start from £2,180 GBPSave up to £2,654 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
£2,180 GBP