Round|Natural|GIA

1.30ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 7518928166

Certificate GIA 7518928166

Diamond specifications and retailer prices

From £3,179 GBP
$4,259 USD
As of October 30, 2026
Save £3,550 GBP (53%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £6,729 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7518928166. Listed at 28 retailers as of October 30, 2026, with a 112% 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7518928166
Dimensions6.87 × 6.94 × 4.34 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Top View
6.87 mm6.94 mm1.30 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 7518928166
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.8%

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: Oct 30
Current: £3,883 GBP|Low: £3,084 GBP|High: £6,485 GBP|Avg: £4,220 GBP|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 4£3,179 GBP
Retailer 11£3,288 GBP
Retailer 2£3,364 GBP
Retailer 9£3,644 GBP
Retailer 12£3,858 GBP
Retailer 1£3,883 GBP
Retailer 5£3,899 GBP
Retailer 3£4,056 GBP
Retailer 10£4,407 GBP
Retailer 7£4,546 GBP
Retailer 8£4,899 GBP
Retailer 6£6,442 GBP

35 data points across 12 retailers

28 retailers£3,179 GBP to £6,729 GBP

A
Cheapest Retailer
-
£3,179 GBP
$4,259 USD
A
Retailer 2
-
£3,288 GBP
$4,405 USD
View
A
Retailer 3
-
£3,364 GBP
$4,507 USD
View
Final sale: no returns
A
Retailer 4
-
£3,433 GBP
$4,600 USD
View
A
Retailer 5
-
£3,644 GBP
$4,883 USD
View
Retailer 6
-
£3,644 GBP
$4,883 USD
View
Price last confirmed 43 days ago
Retailer 7
-
£3,644 GBP
$4,883 USD
View
Price last confirmed 22 days ago
Retailer 8
-
£3,644 GBP
$4,883 USD
View
Price last confirmed 14 days ago
Retailer 9
-
£3,644 GBP
$4,883 USD
View
Price last confirmed 31 days ago
Retailer 10
-
£3,644 GBP
$4,883 USD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
£3,858 GBP
$5,169 USD
View
Retailer 12
-
£3,858 GBP
$5,169 USD
View
Price last confirmed 21 days ago
A
Retailer 13
-
£3,883 GBP
View
B+
Retailer 14
-
£3,899 GBP
View
Retailer 15
-
£4,056 GBP
A$8,360 AUD
View
Price last confirmed 20 days ago
Retailer 16
-
£4,206 GBP
$5,635 USD
View
Price last confirmed 38 days ago
Retailer 17
-
£4,206 GBP
$5,635 USD
View
Price last confirmed 21 days ago
Retailer 18
-
£4,206 GBP
$5,635 USD
View
Price last confirmed 9 days ago
B+
Retailer 19
-
£4,206 GBP
$5,635 USD
View
B+
Retailer 20
-
£4,407 GBP
View
Retailer 21
-
£4,440 GBP
$5,949 USD
View
Price last confirmed 15 days ago
B+
Retailer 22
-
£4,546 GBP
€5,801 EUR
View
B+
Retailer 23
-
£4,899 GBP
ZAR 106,041 ZAR
View
B
Retailer 24
-
£6,442 GBP
View
B
Retailer 25
-
£6,729 GBP
$9,016 USD
View
Retailer 26
-
£6,729 GBP
$9,016 USD
View
Price last confirmed 40 days ago
Retailer 27
-
£6,729 GBP
$9,016 USD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
2682f6d3-f1db-4e26-aa79-b95c94e1323a · Oct 20
£6,729 GBP
$9,016 USD
View
Price last confirmed 10 days ago
27 more retailers have this diamond
Prices start from £3,179 GBPSave up to £3,550 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
£3,179 GBP