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Round|Natural|GIA

1.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 1449322551

Certificate GIA 1449322551

Diamond specifications and retailer prices

From £2,650 GBP
As of November 5, 2026
Save £2,699 GBP (50%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,349 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 1449322551. Listed at 11 retailers as of November 5, 2026, with prices from £2,650 to £5,349, a £2,699 spread on the same certified stone. NZ Jewellers lists it at £5,349. 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
FluorescenceFaint
Crown angle32°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1449322551
Dimensions7.47 × 7.48 × 4.44 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
7.47 mm7.48 mm1.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1449322551
Side View
Table 59.0%Crown 32°Girdle: MED-STKPavilion 41°Culet: NoneDepth 59.4%

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 5
Current: £5,349 GBP|Low: £2,488 GBP|High: £5,349 GBP|Avg: £3,318 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 3£2,488 GBP
Retailer 12£2,650 GBP
Retailer 10£2,702 GBP
Retailer 6£3,070 GBP
Retailer 7£3,070 GBP
Retailer 8£3,070 GBP
Retailer 11£3,179 GBP
Retailer 5£3,460 GBP
Retailer 9£3,543 GBP
Retailer 4£3,653 GBP
Retailer 2£3,955 GBP
NZ Jewellers£5,349 GBP

38 data points across 12 retailers

11 retailers£2,650 GBP to £5,349 GBP

B+
Cheapest Retailer
-
£2,650 GBP
B+
Retailer 2
-
£2,664 GBP
View
B
Retailer 3
-
£2,702 GBP
View
Retailer 4
-
£3,070 GBP
View
Price last confirmed 8 days ago
B
Retailer 5
-
£3,070 GBP
View
B
Retailer 6
-
£3,070 GBP
View
B
Retailer 7
-
£3,179 GBP
View
B
Retailer 8
-
£3,460 GBP
View
B
Retailer 9
-
£3,543 GBP
View
B
Retailer 10
-
£3,955 GBP
View
Most Expensive
C
NZ Jewellers
114721b4-1935-4c42-9da7-1e9b2b166e50 · Nov 5
£5,349 GBP
$7,199 USD
View
10 more retailers have this diamond
Prices start from £2,650 GBPSave up to £2,699 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
£2,650 GBP