Round|Natural|GIA

1.30ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2528810151

Certificate GIA 2528810151

Diamond specifications and retailer prices

From £1,987 GBP
As of November 4, 2026
Save £2,360 GBP (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,542 GBP at NZ Jewellers · As of October 17, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2528810151. Listed at 18 retailers as of November 4, 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceVery Strong
Crown angle33°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2528810151
Dimensions6.97 × 7.00 × 4.31 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.97 mm7.00 mm1.30 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceVery Strong
CertificateGIA 2528810151
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.4°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 4
Current: £2,763 GBP|Low: £1,987 GBP|High: £4,457 GBP|Avg: £2,745 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10£1,987 GBP
Retailer 7£2,076 GBP
Retailer 8£2,316 GBP
Retailer 2£2,407 GBP
Retailer 6£2,493 GBP
Retailer 11£2,607 GBP
Retailer 4£2,681 GBP
Retailer 1£2,763 GBP
Retailer 3£2,821 GBP
Retailer 5£3,028 GBP
Retailer 9£4,348 GBP

30 data points across 11 retailers

18 retailers£1,987 GBP to £4,348 GBP

A
Cheapest Retailer
-
£1,987 GBP
A
Retailer 2
-
£2,076 GBP
View
A
Retailer 3
-
£2,316 GBP
View
A
Retailer 4
-
£2,369 GBP
View
A
Retailer 5
-
£2,407 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,438 GBP
View
A
Retailer 7
-
£2,441 GBP
View
A
Retailer 8
-
£2,493 GBP
View
Retailer 9
-
£2,607 GBP
View
Price last confirmed 17 days ago
Retailer 10
-
£2,607 GBP
View
Price last confirmed 21 days ago
A
Retailer 11
-
£2,681 GBP
View
Retailer 12
-
£2,707 GBP
View
Price last confirmed 22 days ago
A
Retailer 13
-
£2,763 GBP
View
Retailer 14
-
£2,821 GBP
View
Price last confirmed 29 days ago
Retailer 15
-
£3,008 GBP
View
Price last confirmed 19 days ago
A
Retailer 16
-
£3,028 GBP
View
B
Retailer 17
-
£4,348 GBP
View
Most Expensive
NZ Jewellers
850537c0-77a6-497c-ab10-3d486638b5d1 · Oct 17
£4,542 GBP
$6,113 USD
View
Price last confirmed 19 days ago
17 more retailers have this diamond
Prices start from £1,987 GBPSave up to £2,360 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
£1,987 GBP