Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2427279307

Certificate GIA 2427279307

Diamond specifications and retailer prices

From £6,761 GBP
As of November 1, 2026
Save £7,326 GBP (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £14,087 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2427279307. Listed at 19 retailers as of November 1, 2026, with prices from £6,761 to £14,087, a £7,326 spread on the same certified stone. Diamond Quarter lists it at £14,087. 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

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2427279307
Dimensions7.41 × 7.37 × 4.53 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
7.41 mm7.37 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2427279307
Side View
Table 58.0%Crown 32°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £9,048 GBP|Low: £6,761 GBP|High: £11,691 GBP|Avg: £8,692 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£6,761 GBP
Retailer 9£6,863 GBP
Retailer 10£7,318 GBP
Retailer 5£7,966 GBP
Retailer 2£8,136 GBP
Retailer 7£8,144 GBP
Retailer 4£8,816 GBP
Retailer 1£9,048 GBP
Retailer 3£10,791 GBP
Retailer 6£11,521 GBP

40 data points across 10 retailers

19 retailers£6,761 GBP to £14,087 GBP

B+
Cheapest Retailer
-
£6,761 GBP
B+
Retailer 2
-
£6,863 GBP
View
B+
Retailer 3
-
£7,318 GBP
View
Retailer 4
-
£7,397 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£7,966 GBP
View
B+
Retailer 6
-
£8,013 GBP
View
B+
Retailer 7
-
£8,136 GBP
View
Retailer 8
-
£8,144 GBP
View
Price last confirmed 14 days ago
B+
Retailer 9
-
£8,671 GBP
View
B+
Retailer 10
-
£8,671 GBP
View
B+
Retailer 11
-
£8,816 GBP
View
B+
Retailer 12
-
£9,048 GBP
View
B
Retailer 13
-
£9,247 GBP
View
B
Retailer 14
-
£9,681 GBP
View
Retailer 15
-
£9,732 GBP
View
Price last confirmed 14 days ago
B
Retailer 16
-
£10,791 GBP
View
B
Retailer 17
-
£11,521 GBP
View
B
Retailer 18
-
£12,328 GBP
View
Most Expensive
B
Diamond Quarter
1.51SI1E2407034AN · Nov 5
£14,087 GBP
View
18 more retailers have this diamond
Prices start from £6,761 GBPSave up to £7,326 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.

B+
1.51ct Round
£6,761 GBP