Round|Natural|GIA

3.09ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1487892279

Certificate GIA 1487892279

Diamond specifications and retailer prices

From £18,415 GBP
As of November 5, 2026
Save £5,587 GBP (23%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £24,002 GBP at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

About this 3.09ct natural round diamond

This 3.09ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1487892279. Listed at 8 retailers as of November 5, 2026, with prices from £18,415 to £24,002, a £5,587 spread on the same certified stone. The Diamond Guys lists it at £24,002. 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

3.09
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1487892279
Dimensions9.34 × 9.26 × 5.77 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
9.34 mm9.26 mm3.09 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1487892279
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £23,869 GBP|Low: £18,415 GBP|High: £23,999 GBP|Avg: £21,040 GBP|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3£18,415 GBP
Retailer 2£19,979 GBP
Retailer 4£21,514 GBP
Retailer 1£23,869 GBP

44 data points across 4 retailers

8 retailers£18,415 GBP to £24,002 GBP

B+
Cheapest Retailer
-
£18,415 GBP
B+
Retailer 2
-
£18,955 GBP
View
B+
Retailer 3
-
£19,979 GBP
View
B
Retailer 4
-
£20,749 GBP
View
B
Retailer 5
-
£21,116 GBP
View
B
Retailer 6
-
£21,514 GBP
View
B
Retailer 7
-
£23,869 GBP
View
Most Expensive
B
The Diamond Guys
1917986942 · Nov 6
£24,002 GBP
$32,304 USD
View
7 more retailers have this diamond
Prices start from £18,415 GBPSave up to £5,587 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+
3.09ct Round
£18,415 GBP