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Round|Natural|GIA

6.18ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2245040202

Certificate GIA 2245040202

Diamond specifications and retailer prices

From £69,452 GBP
$93,058 USD
As of October 30, 2026
Save £43,957 GBP (39%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £113,409 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 6.18ct natural round diamond

This 6.18ct natural round sits in the over five carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2245040202. Listed at 8 retailers as of October 30, 2026, with prices from £69,452 to £113,409, a £43,957 spread on the same certified stone. MOH London lists it at £113,409. 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

6.18
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2245040202
Dimensions11.74 × 11.71 × 7.17 mm
L/W Ratio1.00
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle
Top View
11.74 mm11.71 mm6.18 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245040202
Side View
Table 59.0%Crown 35°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 61.2%

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: Oct 30
Current: £113,409 GBP|Low: £63,841 GBP|High: £114,017 GBP|Avg: £79,296 GBP|+7.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 7£63,841 GBP
Retailer 4£69,452 GBP
Retailer 5£69,843 GBP
Retailer 3£72,953 GBP
Retailer 6£73,608 GBP
Retailer 8£76,676 GBP
Retailer 2£86,048 GBP
MOH London£113,409 GBP

11 data points across 8 retailers

8 retailers£69,452 GBP to £113,409 GBP

B+
Cheapest Retailer
-
£69,452 GBP
$93,058 USD
B+
Retailer 2
-
£69,843 GBP
$93,582 USD
View
B+
Retailer 3
-
£72,953 GBP
View
B+
Retailer 4
-
£75,641 GBP
$101,351 USD
View
Retailer 5
-
£79,742 GBP
$106,846 USD
View
Price last confirmed 31 days ago
Retailer 6
-
£82,810 GBP
$110,956 USD
View
Price last confirmed 33 days ago
B
Retailer 7
-
£86,048 GBP
€109,804 EUR
View
Most Expensive
B
MOH London
C36C08406 · Nov 1
£113,409 GBP
View
7 more retailers have this diamond
Prices start from £69,452 GBPSave up to £43,957 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+
6.18ct Round
£69,452 GBP