Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 1155978214

Certificate GIA 1155978214

Diamond specifications and retailer prices

From £8,214 GBP
As of November 1, 2026
Save £7,604 GBP (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £15,818 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 1155978214. Listed at 18 retailers as of November 1, 2026, with prices from £8,214 to £15,818, a £7,604 spread on the same certified stone. Diamond Quarter lists it at £15,818. 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
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1155978214
Dimensions7.38 × 7.36 × 4.47 mm
L/W Ratio1.00
Culet sizeNone
Top View
7.38 mm7.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1155978214
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.6%

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: £13,606 GBP|Low: £7,772 GBP|High: £14,739 GBP|Avg: £10,883 GBP|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6£8,214 GBP
Retailer 7£8,937 GBP
Retailer 2£9,783 GBP
Retailer 8£9,947 GBP
Retailer 5£10,010 GBP
Retailer 3£11,189 GBP
Retailer 1£13,606 GBP
Retailer 4£14,525 GBP

45 data points across 8 retailers

18 retailers£8,214 GBP to £15,818 GBP

B+
Cheapest Retailer
-
£8,214 GBP
B+
Retailer 2
-
£8,514 GBP
View
B+
Retailer 3
-
£8,653 GBP
View
B+
Retailer 4
-
£8,713 GBP
View
B
Retailer 5
-
£8,937 GBP
View
Final sale: no returns
B
Retailer 6
-
£9,176 GBP
View
Retailer 7
-
£9,326 GBP
View
Price last confirmed 8 days ago
B
Retailer 8
-
£9,783 GBP
View
B
Retailer 9
-
£9,947 GBP
View
Retailer 10
-
£10,010 GBP
View
Price last confirmed 14 days ago
B
Retailer 11
-
£10,102 GBP
View
B
Retailer 12
-
£10,491 GBP
View
B
Retailer 13
-
£10,805 GBP
View
B
Retailer 14
-
£11,189 GBP
View
B
Retailer 15
-
£13,606 GBP
View
B
Retailer 16
-
£14,525 GBP
View
B
Retailer 17
-
£15,543 GBP
View
Most Expensive
B
Diamond Quarter
1.51SI1E1114893CN · Nov 5
£15,818 GBP
View
17 more retailers have this diamond
Prices start from £8,214 GBPSave up to £7,604 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
£8,214 GBP