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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

ID • I/SI2 • GIA 296

Certificate GIA 296

Diamond specifications and retailer prices

From £2,005 GBP
As of November 3, 2026
Save £3,143 GBP (61%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £5,196 GBP at NZ Jewellers · As of October 9, 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. Listed at 18 retailers as of November 2, 2026, with a 157% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 296
Dimensions7.26 × 7.31 × 4.57 mm
L/W Ratio1.01
Top View
7.26 mm7.31 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 296
Side View
Table 57.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.6%

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 3
Current: £4,193 GBP|Low: £2,005 GBP|High: £5,196 GBP|Avg: £3,569 GBP|-19.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 5£2,005 GBP
Retailer 4£2,955 GBP
Retailer 7£3,296 GBP
Retailer 6£3,403 GBP
Retailer 3£4,006 GBP
Retailer 2£4,091 GBP
NZ Jewellers£4,193 GBP

23 data points across 7 retailers

18 retailers£2,005 GBP to £5,148 GBP

A
Cheapest Retailer
-
£2,005 GBP
A
Retailer 2
-
£2,083 GBP
View
A
Retailer 3
-
£2,710 GBP
View
A
Retailer 4
-
£2,955 GBP
View
A
Retailer 5
-
£2,955 GBP
View
Retailer 6
-
£2,982 GBP
View
Price last confirmed 27 days ago
Retailer 7
-
£2,982 GBP
View
Price last confirmed 22 days ago
A
Retailer 8
-
£3,062 GBP
View
Retailer 9
-
£3,296 GBP
View
Price last confirmed 16 days ago
Retailer 10
-
£3,403 GBP
View
Price last confirmed 19 days ago
Retailer 11
-
£4,000 GBP
View
Price last confirmed 17 days ago
B+
Retailer 12
-
£4,006 GBP
View
B+
Retailer 13
-
£4,091 GBP
View
B+
Retailer 14
-
£4,193 GBP
View
Retailer 15
-
£4,369 GBP
View
Price last confirmed 34 days ago
B+
Retailer 16
-
£5,148 GBP
View
Retailer 17
-
£5,196 GBP
View
Price last confirmed 34 days ago
Most Expensive
NZ Jewellers
4fd0d3ee-e944-4b08-bd2a-022067e71fbc · Oct 9
£5,196 GBP
$6,993 USD
View
Price last confirmed 28 days ago
17 more retailers have this diamond
Prices start from £2,005 GBPSave up to £3,143 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
£2,005 GBP