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Round|Natural|GIA

2.51ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1547670666

Certificate GIA 1547670666

Diamond specifications and retailer prices

From £5,395 GBP
As of November 4, 2026
Save £1,369 GBP (20%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £6,763 GBP at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1547670666. Listed at 5 retailers as of November 4, 2026, with prices from £5,395 to £6,763, a £1,369 spread on the same certified stone. The Diamond Guys lists it at £6,763. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1547670666
Dimensions8.67 × 8.71 × 5.38 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.67 mm8.71 mm2.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1547670666
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.0%

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 4
Current: £6,306 GBP|Low: £4,365 GBP|High: £7,960 GBP|Avg: £6,366 GBP|-7.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
The Diamond Guys
November 5, 2026
Retailer 6£4,365 GBP
Retailer 4£5,395 GBP
Retailer 3£6,219 GBP
Retailer 1£6,306 GBP
Retailer 2£6,405 GBP
The Diamond Guys£6,763 GBP
Retailer 5£7,960 GBP

27 data points across 7 retailers

5 retailers£5,395 GBP to £6,763 GBP

A
Cheapest Retailer
-
£5,395 GBP
B+
Retailer 2
-
£6,219 GBP
View
B+
Retailer 3
-
£6,306 GBP
View
B+
Retailer 4
-
£6,405 GBP
View
Most Expensive
B+
The Diamond Guys
1922550695 · Nov 6
£6,763 GBP
$9,103 USD
View
4 more retailers have this diamond
Prices start from £5,395 GBPSave up to £1,369 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
2.51ct Round
£5,395 GBP