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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2235864871

Certificate GIA 2235864871

Diamond specifications and retailer prices

From £4,196 GBP
As of November 4, 2026
Save £4,687 GBP (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £8,883 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2235864871. Listed at 17 retailers as of November 4, 2026, with prices from £4,196 to £8,883, a £4,687 spread on the same certified stone. NZ Jewellers lists it at £8,883. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2235864871
Dimensions7.30 × 7.26 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.26 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2235864871
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.9%

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 4
Current: £8,883 GBP|Low: £4,071 GBP|High: £8,883 GBP|Avg: £5,816 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
November 6, 2026
Retailer 9£4,441 GBP
Retailer 3£4,812 GBP
Retailer 10£4,812 GBP
Retailer 11£4,812 GBP
Retailer 5£5,010 GBP
Retailer 2£5,151 GBP
Retailer 6£5,459 GBP
Retailer 12£5,552 GBP
Retailer 4£6,332 GBP
Retailer 7£7,382 GBP
Retailer 8£7,700 GBP
NZ Jewellers£8,883 GBP

40 data points across 12 retailers

17 retailers£4,196 GBP to £8,883 GBP

B+
Cheapest Retailer
-
£4,196 GBP
B+
Retailer 2
-
£4,358 GBP
View
B+
Retailer 3
-
£4,441 GBP
View
Final sale: no returns
B+
Retailer 4
-
£4,812 GBP
View
Retailer 5
-
£4,812 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£4,812 GBP
View
B+
Retailer 7
-
£4,901 GBP
View
B+
Retailer 8
-
£5,010 GBP
View
B+
Retailer 9
-
£5,151 GBP
View
B
Retailer 10
-
£5,350 GBP
View
B
Retailer 11
-
£5,350 GBP
View
B
Retailer 12
-
£5,459 GBP
View
B
Retailer 13
-
£5,528 GBP
View
B
Retailer 14
-
£5,552 GBP
View
B
Retailer 15
-
£7,382 GBP
View
B
Retailer 16
-
£7,700 GBP
View
Most Expensive
B
NZ Jewellers
6cca4859-36cc-4e7e-8995-258bec1d02d7 · Nov 5
£8,883 GBP
$11,956 USD
View
16 more retailers have this diamond
Prices start from £4,196 GBPSave up to £4,687 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
£4,196 GBP