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Round|Natural|GIA

1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2557211440

Certificate GIA 2557211440

Diamond specifications and retailer prices

From £1,360 GBP
As of November 4, 2026
Save £1,803 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,163 GBP at MOH London · As of November 4, 2026
View at MOH London

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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557211440. Listed at 13 retailers as of November 4, 2026, with prices from £1,360 to £3,163, a £1,803 spread on the same certified stone. MOH London lists it at £3,163. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557211440
Dimensions6.94 × 6.90 × 4.34 mm
L/W Ratio1.01
Top View
6.94 mm6.90 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557211440
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

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 4
Current: £3,163 GBP|Low: £1,350 GBP|High: £3,892 GBP|Avg: £2,081 GBP|-2.8%
MOH London
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
Retailer 15
Retailer 16
November 6, 2026
Retailer 12£1,360 GBP
Retailer 6£1,432 GBP
Retailer 8£1,652 GBP
Retailer 13£1,661 GBP
Retailer 16£1,661 GBP
Retailer 3£1,671 GBP
Retailer 2£1,732 GBP
Retailer 9£1,892 GBP
Retailer 4£1,898 GBP
Retailer 11£1,904 GBP
Retailer 15£2,018 GBP
Retailer 10£2,210 GBP
Retailer 5£2,260 GBP
Retailer 14£2,774 GBP
MOH London£3,163 GBP
Retailer 7£3,492 GBP

30 data points across 16 retailers

13 retailers£1,360 GBP to £3,163 GBP

A
Cheapest Retailer
-
£1,360 GBP
Retailer 2
-
£1,432 GBP
View
Price last confirmed 29 days ago
A
Retailer 3
-
£1,661 GBP
View
A
Retailer 4
-
£1,661 GBP
View
A
Retailer 5
-
£1,671 GBP
View
Final sale: no returns
A
Retailer 6
-
£1,732 GBP
View
A
Retailer 7
-
£1,892 GBP
View
B+
Retailer 8
-
£1,898 GBP
View
A
Retailer 9
-
£1,904 GBP
View
B+
Retailer 10
-
£2,018 GBP
View
B+
Retailer 11
-
£2,210 GBP
View
B+
Retailer 12
-
£2,774 GBP
View
Most Expensive
B
MOH London
488879128 · Nov 4
£3,163 GBP
View
12 more retailers have this diamond
Prices start from £1,360 GBPSave up to £1,803 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
£1,360 GBP