Round|Natural|GIA

1.30ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1548400629

Certificate GIA 1548400629

Diamond specifications and retailer prices

From £2,758 GBP
As of November 6, 2026
Save £3,269 GBP (54%) vs most expensive(unlock to see where)
32 retailers carry this diamond
Most expensive: £6,027 GBP at NZ Jewellers · As of October 20, 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 1548400629. Listed at 32 retailers as of November 5, 2026, with a 119% 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
FluorescenceFaint
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1548400629
Dimensions6.90 × 6.93 × 4.33 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.90 mm6.93 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1548400629
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: £3,310 GBP|Low: £2,651 GBP|High: £5,568 GBP|Avg: £3,524 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 3£2,758 GBP
Retailer 12£2,856 GBP
Retailer 2£2,892 GBP
Retailer 5£2,981 GBP
Retailer 11£3,134 GBP
Retailer 1£3,310 GBP
Retailer 13£3,317 GBP
Retailer 9£3,384 GBP
Retailer 4£3,487 GBP
Retailer 8£3,852 GBP
Retailer 6£3,885 GBP
Retailer 7£4,220 GBP
Retailer 10£5,494 GBP

36 data points across 13 retailers

32 retailers£2,758 GBP to £6,027 GBP

A
Cheapest Retailer
-
£2,758 GBP
A
Retailer 2
-
£2,856 GBP
View
B+
Retailer 3
-
£2,892 GBP
View
Final sale: no returns
B+
Retailer 4
-
£2,981 GBP
View
B+
Retailer 5
-
£3,121 GBP
View
Retailer 6
-
£3,134 GBP
View
Price last confirmed 29 days ago
Retailer 7
-
£3,134 GBP
View
Price last confirmed 50 days ago
Retailer 8
-
£3,134 GBP
View
Price last confirmed 8 days ago
Retailer 9
-
£3,134 GBP
View
Price last confirmed 21 days ago
Retailer 10
-
£3,134 GBP
View
Price last confirmed 38 days ago
Retailer 11
-
£3,134 GBP
View
Price last confirmed 15 days ago
B+
Retailer 12
-
£3,310 GBP
View
B+
Retailer 13
-
£3,317 GBP
View
Retailer 14
-
£3,317 GBP
View
Price last confirmed 28 days ago
B+
Retailer 15
-
£3,384 GBP
View
B+
Retailer 16
-
£3,392 GBP
View
B+
Retailer 17
-
£3,392 GBP
View
Retailer 18
-
£3,487 GBP
View
Price last confirmed 28 days ago
B+
Retailer 19
-
£3,504 GBP
View
Retailer 20
-
£3,616 GBP
View
Price last confirmed 45 days ago
Retailer 21
-
£3,616 GBP
View
Price last confirmed 28 days ago
Retailer 22
-
£3,616 GBP
View
Price last confirmed 16 days ago
B
Retailer 23
-
£3,616 GBP
View
B+
Retailer 24
-
£3,852 GBP
View
B+
Retailer 25
-
£3,885 GBP
View
Retailer 26
-
£3,912 GBP
View
Price last confirmed 22 days ago
B
Retailer 27
-
£4,220 GBP
View
B
Retailer 28
-
£5,494 GBP
View
Retailer 29
-
£6,027 GBP
View
Price last confirmed 48 days ago
B
Retailer 30
-
£6,027 GBP
View
Retailer 31
-
£6,027 GBP
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
44391ff5-c097-4bda-8922-567e8b4de253 · Oct 20
£6,027 GBP
$8,067 USD
View
Price last confirmed 17 days ago
31 more retailers have this diamond
Prices start from £2,758 GBPSave up to £3,269 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
£2,758 GBP