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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 7508361844

Certificate GIA 7508361844

Diamond specifications and retailer prices

From £2,001 GBP
As of November 4, 2026
Save £2,670 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,671 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 M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7508361844. Listed at 13 retailers as of November 4, 2026, with prices from £2,001 to £4,671, a £2,670 spread on the same certified stone. NZ Jewellers lists it at £4,671. 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7508361844
Dimensions7.30 × 7.35 × 4.62 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Key to symbols
Feather, Twinning Wisp, Crystal, Needle
Top View
7.30 mm7.35 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7508361844
Side View
Table 56.0%Crown 34.5°Girdle: STK-MEDPavilion 41.6°Culet: NoneDepth 63.0%

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: £4,671 GBP|Low: £2,001 GBP|High: £4,671 GBP|Avg: £2,604 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 7£2,001 GBP
Retailer 9£2,063 GBP
Retailer 11£2,234 GBP
Retailer 12£2,234 GBP
Retailer 6£2,320 GBP
Retailer 4£2,340 GBP
Retailer 5£2,447 GBP
Retailer 8£2,553 GBP
Retailer 10£2,578 GBP
Retailer 3£2,658 GBP
Retailer 2£2,949 GBP
NZ Jewellers£4,671 GBP

35 data points across 12 retailers

13 retailers£2,001 GBP to £4,671 GBP

B+
Cheapest Retailer
-
£2,001 GBP
B+
Retailer 2
-
£2,063 GBP
View
Retailer 3
-
£2,234 GBP
View
Price last confirmed 60 days ago
Retailer 4
-
£2,234 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£2,234 GBP
View
B+
Retailer 6
-
£2,320 GBP
View
B+
Retailer 7
-
£2,340 GBP
View
B+
Retailer 8
-
£2,447 GBP
View
B
Retailer 9
-
£2,553 GBP
View
Retailer 10
-
£2,578 GBP
View
Price last confirmed 60 days ago
B
Retailer 11
-
£2,578 GBP
View
B
Retailer 12
-
£2,949 GBP
View
Most Expensive
C
NZ Jewellers
c14ff665-9328-4d6b-9dba-aea7e48398d8 · Nov 5
£4,671 GBP
$6,287 USD
View
12 more retailers have this diamond
Prices start from £2,001 GBPSave up to £2,670 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
£2,001 GBP