Round|Natural|GIA

1.30ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 5483618067

Certificate GIA 5483618067

Diamond specifications and retailer prices

From £1,339 GBP
As of November 6, 2026
Save £508 GBP (28%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,321 GBP at NZ Jewellers · As of September 26, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5483618067. Listed at 10 retailers as of November 5, 2026, with a 38% 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5483618067
Dimensions6.95 × 6.98 × 4.29 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.95 mm6.98 mm1.30 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5483618067
Side View
Table 58.0%Crown 35°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
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: £1,339 GBP|Low: £1,337 GBP|High: £1,865 GBP|Avg: £1,567 GBP|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 1£1,339 GBP
Retailer 4£1,401 GBP
Retailer 2£1,661 GBP
Retailer 3£1,847 GBP

43 data points across 4 retailers

10 retailers£1,339 GBP to £1,847 GBP

A
Cheapest Retailer
-
£1,339 GBP
Retailer 2
-
£1,362 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£1,362 GBP
View
Price last confirmed 29 days ago
A
Retailer 4
-
£1,401 GBP
View
Retailer 5
-
£1,424 GBP
View
Price last confirmed 38 days ago
Retailer 6
-
£1,571 GBP
View
Price last confirmed 38 days ago
B+
Retailer 7
-
£1,661 GBP
View
B+
Retailer 8
-
£1,847 GBP
View
Retailer 9
-
£3,215 GBP
View
Price last confirmed 69 days ago
Most Expensive
NZ Jewellers
9a8e9a66-55b1-4969-aa3d-c47a8b905c99 · Sep 26
£3,321 GBP
$4,470 USD
View
Price last confirmed 40 days ago
9 more retailers have this diamond
Prices start from £1,339 GBPSave up to £508 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
£1,339 GBP