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Round|Natural|GIA

2.51ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 3555571199

Certificate GIA 3555571199

Diamond specifications and retailer prices

From £7,475 GBP
As of November 4, 2026
Save £5,953 GBP (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £13,428 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555571199. Listed at 10 retailers as of November 4, 2026, with prices from £7,475 to £13,428, a £5,953 spread on the same certified stone. NZ Jewellers lists it at £13,428. 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

2.51
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 3555571199
Dimensions8.61 × 8.65 × 5.40 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.61 mm8.65 mm2.51 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 3555571199
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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: £13,428 GBP|Low: £6,360 GBP|High: £13,428 GBP|Avg: £8,748 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£6,360 GBP
Retailer 4£6,756 GBP
Retailer 12£7,475 GBP
Retailer 8£7,547 GBP
Retailer 9£8,057 GBP
Retailer 11£8,728 GBP
Retailer 6£8,862 GBP
Retailer 10£8,929 GBP
Retailer 5£9,660 GBP
Retailer 7£10,070 GBP
Retailer 2£10,491 GBP
NZ Jewellers£13,428 GBP

38 data points across 12 retailers

10 retailers£7,475 GBP to £13,428 GBP

B+
Cheapest Retailer
-
£7,475 GBP
B+
Retailer 2
-
£7,547 GBP
View
Retailer 3
-
£8,057 GBP
View
Price last confirmed 8 days ago
B
Retailer 4
-
£8,728 GBP
View
B
Retailer 5
-
£8,862 GBP
View
B
Retailer 6
-
£8,929 GBP
View
B
Retailer 7
-
£9,660 GBP
View
B
Retailer 8
-
£10,070 GBP
View
B
Retailer 9
-
£10,491 GBP
View
Most Expensive
C
NZ Jewellers
928eeac4-075c-4203-be19-aaab7d08d85b · Nov 5
£13,428 GBP
$18,073 USD
View
9 more retailers have this diamond
Prices start from £7,475 GBPSave up to £5,953 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+
2.51ct Round
£7,475 GBP