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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 $132,477 AUD
$93,058 USD
As of October 30, 2026
Save $83,846 AUD (39%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $216,324 AUD 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 $132,477 to $216,324, a $83,846 spread on the same certified stone. MOH London lists it at $216,324. 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: $216,324 AUD|Low: $121,775 AUD|High: $217,483 AUD|Avg: $151,035 AUD|+7.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 7$121,775 AUD
Retailer 4$132,477 AUD
Retailer 5$133,223 AUD
Retailer 2$139,156 AUD
Retailer 6$140,405 AUD
Retailer 8$146,256 AUD
Retailer 3$164,133 AUD
MOH London$216,324 AUD

12 data points across 8 retailers

8 retailers$132,477 AUD to $216,324 AUD

B+
Cheapest Retailer
-
$132,477 AUD
$93,058 USD
B+
Retailer 2
-
$133,223 AUD
$93,582 USD
View
B+
Retailer 3
-
$139,156 AUD
£76,968 GBP
View
B+
Retailer 4
-
$144,283 AUD
$101,351 USD
View
Retailer 5
-
$152,106 AUD
$106,846 USD
View
Price last confirmed 31 days ago
Retailer 6
-
$157,957 AUD
$110,956 USD
View
Price last confirmed 34 days ago
B
Retailer 7
-
$164,133 AUD
€109,804 EUR
View
Most Expensive
B
MOH London
C36C08406 · Nov 1
$216,324 AUD
£119,650 GBP
View
7 more retailers have this diamond
Prices start from $132,477 AUDSave up to $83,846 AUD

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
$132,477 AUD