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Round|Natural|GIA

2.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5516107542

Certificate GIA 5516107542

Diamond specifications and retailer prices

From £9,202 GBP
As of November 1, 2026
Save £6,980 GBP (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £16,182 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5516107542. Listed at 13 retailers as of November 1, 2026, with prices from £9,202 to £16,182, a £6,980 spread on the same certified stone. MOH London lists it at £16,182. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5516107542
Dimensions8.71 × 8.67 × 5.41 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
8.71 mm8.67 mm2.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5516107542
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.8°Culet: NoneDepth 62.3%

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 1
Current: £16,182 GBP|Low: £9,202 GBP|High: £16,376 GBP|Avg: £12,875 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5£9,202 GBP
Retailer 3£10,880 GBP
Retailer 6£11,052 GBP
Retailer 4£12,970 GBP
Retailer 2£14,228 GBP
Retailer 7£14,679 GBP
MOH London£16,182 GBP

43 data points across 7 retailers

13 retailers£9,202 GBP to £16,182 GBP

A
Cheapest Retailer
-
£9,202 GBP
A
Retailer 2
-
£9,613 GBP
View
B+
Retailer 3
-
£10,175 GBP
View
Retailer 4
-
£10,361 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£10,447 GBP
View
B+
Retailer 6
-
£10,880 GBP
View
B+
Retailer 7
-
£11,052 GBP
View
B+
Retailer 8
-
£11,224 GBP
View
B+
Retailer 9
-
£11,656 GBP
View
B
Retailer 10
-
£12,970 GBP
View
B
Retailer 11
-
£14,228 GBP
View
B
Retailer 12
-
£14,679 GBP
View
Most Expensive
B
MOH London
3665BC12E · Nov 2
£16,182 GBP
View
12 more retailers have this diamond
Prices start from £9,202 GBPSave up to £6,980 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
£9,202 GBP