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Round|Natural|GIA

1.51ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6512752915

Certificate GIA 6512752915

Diamond specifications and retailer prices

From £4,964 GBP
As of November 4, 2026
Save £6,200 GBP (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £11,163 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 6512752915. Listed at 19 retailers as of November 4, 2026, with prices from £4,964 to £11,163, a £6,200 spread on the same certified stone. NZ Jewellers lists it at £11,163. 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 angle34°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6512752915
Dimensions7.41 × 7.36 × 4.47 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.41 mm7.36 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512752915
Side View
Table 59.0%Crown 34°Girdle: ThickPavilion 40.6°Culet: NoneDepth 60.5%

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: £11,163 GBP|Low: £4,982 GBP|High: £11,163 GBP|Avg: £6,813 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 7£4,982 GBP
Retailer 4£5,569 GBP
Retailer 6£5,581 GBP
Retailer 13£5,582 GBP
Retailer 12£5,946 GBP
Retailer 5£6,047 GBP
Retailer 2£6,084 GBP
Retailer 16£6,140 GBP
Retailer 14£6,330 GBP
Retailer 3£6,977 GBP
Retailer 8£7,088 GBP
Retailer 10£7,246 GBP
Retailer 15£7,350 GBP
Retailer 9£8,143 GBP
Retailer 11£9,277 GBP
NZ Jewellers£11,163 GBP

42 data points across 16 retailers

19 retailers£4,964 GBP to £11,163 GBP

A
Cheapest Retailer
-
£4,964 GBP
A
Retailer 2
-
£4,982 GBP
View
A
Retailer 3
-
£5,226 GBP
View
A
Retailer 4
-
£5,569 GBP
View
A
Retailer 5
-
£5,581 GBP
View
Final sale: no returns
Retailer 6
-
£5,582 GBP
View
Price last confirmed 8 days ago
A
Retailer 7
-
£5,946 GBP
View
B+
Retailer 8
-
£6,047 GBP
View
A
Retailer 9
-
£6,084 GBP
View
B+
Retailer 10
-
£6,140 GBP
View
Retailer 11
-
£6,330 GBP
View
Price last confirmed 14 days ago
B+
Retailer 12
-
£6,662 GBP
View
B+
Retailer 13
-
£6,977 GBP
View
B+
Retailer 14
-
£7,088 GBP
View
B+
Retailer 15
-
£7,246 GBP
View
Retailer 16
-
£7,350 GBP
View
Price last confirmed 14 days ago
B+
Retailer 17
-
£8,143 GBP
View
B
Retailer 18
-
£9,277 GBP
View
Most Expensive
B
NZ Jewellers
6ce93c74-746a-4bb5-80ce-0577f7010937 · Nov 5
£11,163 GBP
$15,025 USD
View
18 more retailers have this diamond
Prices start from £4,964 GBPSave up to £6,200 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
£4,964 GBP