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Round|Natural|GIA

1.30ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2566059521

Certificate GIA 2566059521

Diamond specifications and retailer prices

From £2,375 GBP
As of November 5, 2026
Save £3,053 GBP (56%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £5,429 GBP at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566059521. Listed at 24 retailers as of November 5, 2026, with prices from £2,375 to £5,429, a £3,053 spread on the same certified stone. NZ Jewellers lists it at £5,429. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566059521
Dimensions6.92 × 6.94 × 4.34 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Pinpoint
Top View
6.92 mm6.94 mm1.30 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566059521
Side View
Table 59.0%Crown 34°Girdle: STK-STKPavilion 41.4°Culet: NoneDepth 62.5%

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 5
Current: £5,429 GBP|Low: £2,362 GBP|High: £5,429 GBP|Avg: £3,429 GBP
NZ Jewellers
Retailer 2
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Retailer 24
November 6, 2026
Retailer 23£2,375 GBP
Retailer 6£2,400 GBP
Retailer 19£2,504 GBP
Retailer 5£2,645 GBP
Retailer 16£2,741 GBP
Retailer 10£2,852 GBP
Retailer 7£2,962 GBP
Retailer 20£2,982 GBP
Retailer 15£3,030 GBP
Retailer 9£3,115 GBP
Retailer 11£3,115 GBP
Retailer 3£3,138 GBP
Retailer 8£3,226 GBP
Retailer 2£3,266 GBP
Retailer 12£3,300 GBP
Retailer 24£3,396 GBP
Retailer 22£3,548 GBP
Retailer 14£3,595 GBP
Retailer 17£3,771 GBP
Retailer 21£3,803 GBP
Retailer 13£4,734 GBP
Retailer 18£4,867 GBP
Retailer 4£5,196 GBP
NZ Jewellers£5,429 GBP

20 data points across 24 retailers

24 retailers£2,375 GBP to £5,429 GBP

A
Cheapest Retailer
-
£2,375 GBP
A
Retailer 2
-
£2,400 GBP
View
A
Retailer 3
-
£2,504 GBP
View
A
Retailer 4
-
£2,645 GBP
View
A
Retailer 5
-
£2,741 GBP
View
A
Retailer 6
-
£2,852 GBP
View
B+
Retailer 7
-
£2,962 GBP
View
B+
Retailer 8
-
£2,982 GBP
View
B+
Retailer 9
-
£3,030 GBP
View
B+
Retailer 10
-
£3,115 GBP
View
Retailer 11
-
£3,115 GBP
View
Price last confirmed 8 days ago
B+
Retailer 12
-
£3,138 GBP
View
B+
Retailer 13
-
£3,226 GBP
View
B+
Retailer 14
-
£3,266 GBP
View
B+
Retailer 15
-
£3,300 GBP
View
B+
Retailer 16
-
£3,396 GBP
View
Retailer 17
-
£3,536 GBP
View
Price last confirmed 28 days ago
B+
Retailer 18
-
£3,548 GBP
View
B
Retailer 19
-
£3,595 GBP
View
B+
Retailer 20
-
£3,803 GBP
View
B
Retailer 21
-
£4,734 GBP
View
B
Retailer 22
-
£4,867 GBP
View
B
Retailer 23
-
£5,196 GBP
View
Most Expensive
B
NZ Jewellers
e1485e1c-57db-4148-8f5a-2c5d60bd4497 · Nov 5
£5,429 GBP
$7,266 USD
View
23 more retailers have this diamond
Prices start from £2,375 GBPSave up to £3,053 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
£2,375 GBP