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1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1555561780

Certificate GIA 1555561780

Diamond specifications and retailer prices

From £4,251 GBP
As of November 4, 2026
Save £3,786 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £8,037 GBP at MOH London · As of November 4, 2026
View at MOH London

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 1555561780. Listed at 8 retailers as of November 4, 2026, with prices from £4,251 to £8,037, a £3,786 spread on the same certified stone. MOH London lists it at £8,037. 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
FluorescenceFaint
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555561780
Dimensions7.24 × 7.29 × 4.56 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle
Top View
7.24 mm7.29 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555561780
Side View
Table 58.0%CrownGirdle: MED-STKPavilion 40.8°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: Nov 4
Current: £8,037 GBP|Low: £4,251 GBP|High: £10,129 GBP|Avg: £6,289 GBP|-5.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5£4,251 GBP
Retailer 3£4,806 GBP
Retailer 4£4,922 GBP
Retailer 7£4,966 GBP
Retailer 2£6,284 GBP
MOH London£8,037 GBP
Retailer 6£9,900 GBP

28 data points across 7 retailers

8 retailers£4,251 GBP to £8,037 GBP

A
Cheapest Retailer
-
£4,251 GBP
A
Retailer 2
-
£4,806 GBP
View
A
Retailer 3
-
£4,922 GBP
View
Retailer 4
-
£4,966 GBP
View
Price last confirmed 29 days ago
Retailer 5
-
£5,919 GBP
View
Price last confirmed 30 days ago
Retailer 6
-
£6,080 GBP
View
Price last confirmed 38 days ago
B+
Retailer 7
-
£6,284 GBP
View
Most Expensive
B+
MOH London
4B2C1B6D4 · Nov 4
£8,037 GBP
View
7 more retailers have this diamond
Prices start from £4,251 GBPSave up to £3,786 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
1.51ct Round
£4,251 GBP