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Round|Natural|GIA

5.09ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1192130807

Certificate GIA 1192130807

Diamond specifications and retailer prices

From £44,180 GBP
As of November 6, 2026
Save £33,162 GBP (43%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £77,342 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 5.09ct natural round diamond

This 5.09ct natural round sits in the over five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1192130807. Listed at 7 retailers as of November 4, 2026, with prices from £44,180 to £77,342, a £33,162 spread on the same certified stone. MOH London lists it at £77,342. 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

5.09
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1192130807
Dimensions11.05 × 11.07 × 6.80 mm
L/W Ratio1.00
Culet sizeNone
Top View
11.05 mm11.07 mm5.09 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1192130807
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.4%

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 6
Current: £77,342 GBP|Low: £44,180 GBP|High: £78,484 GBP|Avg: £57,020 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7£44,180 GBP
Retailer 2£48,589 GBP
Retailer 6£55,770 GBP
Retailer 4£55,891 GBP
Retailer 5£55,891 GBP
Retailer 3£58,794 GBP
MOH London£77,342 GBP

30 data points across 7 retailers

7 retailers£44,180 GBP to £77,342 GBP

A
Cheapest Retailer
-
£44,180 GBP
B+
Retailer 2
-
£48,589 GBP
View
B
Retailer 3
-
£55,770 GBP
View
B
Retailer 4
-
£55,891 GBP
View
B
Retailer 5
-
£55,891 GBP
View
B
Retailer 6
-
£58,794 GBP
View
Most Expensive
B
MOH London
01EF9C341 · Nov 4
£77,342 GBP
View
6 more retailers have this diamond
Prices start from £44,180 GBPSave up to £33,162 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
5.09ct Round
£44,180 GBP