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6.55ct G SI2 Round Natural Diamond

EX • G/SI2 • IGI 468180579

Shape and cutting style on the report: Round brilliant

Certificate IGI 468180579

Diamond specifications and retailer prices

From $125,870 AUD
$88,417 USD
As of October 30, 2026
Save $70,649 AUD (36%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $196,519 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 6.55ct natural round diamond

This 6.55ct natural round sits in the over five carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 468180579. Listed at 13 retailers as of October 30, 2026, with prices from $125,870 to $196,519, a $70,649 spread on the same certified stone. MOH London lists it at $196,519. 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

6.55
Carat
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 468180579
Dimensions12.12 × 12.06 × 7.28 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
12.12 mm12.06 mm6.55 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 468180579
Side View
Table 59.5%Crown 33.3°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $196,519 AUD|Low: $119,890 AUD|High: $198,888 AUD|Avg: $144,263 AUD|+4.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 11$125,870 AUD
Retailer 3$127,318 AUD
Retailer 6$131,075 AUD
Retailer 5$136,793 AUD
Retailer 9$138,895 AUD
Retailer 4$140,714 AUD
Retailer 10$144,682 AUD
Retailer 2$147,602 AUD
Retailer 8$150,469 AUD
Retailer 12$154,795 AUD
Retailer 7$156,256 AUD
MOH London$196,519 AUD

42 data points across 12 retailers

13 retailers$125,870 AUD to $196,519 AUD

A
Cheapest Retailer
-
$125,870 AUD
$88,417 USD
A
Retailer 2
-
$127,318 AUD
$89,434 USD
View
Final sale: no returns
A
Retailer 3
-
$131,075 AUD
$92,073 USD
View
Retailer 4
-
$131,075 AUD
$92,073 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$136,793 AUD
£75,661 GBP
View
Retailer 6
-
$138,895 AUD
$97,566 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
$144,682 AUD
$101,631 USD
View
A
Retailer 8
-
$147,602 AUD
€98,745 EUR
View
A
Retailer 9
-
$150,469 AUD
$105,696 USD
View
A
Retailer 10
-
$154,795 AUD
$108,735 USD
View
A
Retailer 11
-
$156,256 AUD
$109,761 USD
View
Retailer 12
-
$156,256 AUD
$109,761 USD
View
Price last confirmed 9 days ago
Most Expensive
B+
MOH London
19068FAD5 · Nov 1
$196,519 AUD
£108,696 GBP
View
12 more retailers have this diamond
Prices start from $125,870 AUDSave up to $70,649 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.

A
6.55ct Round
$125,870 AUD