Round|Natural|GIA

1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2536196818

Certificate GIA 2536196818

Diamond specifications and retailer prices

From £1,531 GBP
As of November 4, 2026
Save £1,962 GBP (56%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,179 GBP at NZ Jewellers · As of September 28, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2536196818. Listed at 18 retailers as of November 4, 2026, with a 128% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2536196818
Dimensions6.95 × 7.00 × 4.30 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.95 mm7.00 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2536196818
Side View
Table 61.0%Crown 34.5°Girdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 61.6%

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: £2,135 GBP|Low: £1,531 GBP|High: £3,544 GBP|Avg: £2,225 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£1,531 GBP
Retailer 4£1,598 GBP
Retailer 5£1,790 GBP
Retailer 9£1,860 GBP
Retailer 2£2,103 GBP
Retailer 1£2,135 GBP
Retailer 3£2,440 GBP
Retailer 7£2,488 GBP
Retailer 6£3,493 GBP

37 data points across 9 retailers

18 retailers£1,531 GBP to £3,493 GBP

A
Cheapest Retailer
-
£1,531 GBP
A
Retailer 2
-
£1,598 GBP
View
A
Retailer 3
-
£1,790 GBP
View
B+
Retailer 4
-
£1,860 GBP
View
B+
Retailer 5
-
£1,901 GBP
View
B+
Retailer 6
-
£1,902 GBP
View
Retailer 7
-
£1,999 GBP
View
Price last confirmed 39 days ago
Retailer 8
-
£1,999 GBP
View
Price last confirmed 25 days ago
Retailer 9
-
£1,999 GBP
View
Price last confirmed 29 days ago
Retailer 10
-
£2,076 GBP
View
Price last confirmed 38 days ago
B+
Retailer 11
-
£2,103 GBP
View
B+
Retailer 12
-
£2,103 GBP
View
B+
Retailer 13
-
£2,135 GBP
View
Retailer 14
-
£2,306 GBP
View
Price last confirmed 38 days ago
B+
Retailer 15
-
£2,440 GBP
View
B+
Retailer 16
-
£2,488 GBP
View
B
Retailer 17
-
£3,493 GBP
View
Most Expensive
NZ Jewellers
6b814ad2-5ce1-4294-a590-99e029ec5668 · Sep 28
£4,179 GBP
$5,625 USD
View
Price last confirmed 39 days ago
17 more retailers have this diamond
Prices start from £1,531 GBPSave up to £1,962 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
£1,531 GBP