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Round|Natural|GIA

6.60ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2223007566

Certificate GIA 2223007566

Diamond specifications and retailer prices

From $270,586 AUD
$190,072 USD
As of October 29, 2026
Save $202,840 AUD (43%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $473,427 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 6.6ct natural round diamond

This 6.6ct natural round sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2223007566. Listed at 17 retailers as of October 29, 2026, with prices from $270,586 to $473,427, a $202,840 spread on the same certified stone. MOH London lists it at $473,427. 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

6.60
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2223007566
Dimensions11.89 × 11.95 × 7.46 mm
L/W Ratio1.01
Star length55%
Lower girdle80%
Top View
11.89 mm11.95 mm6.60 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2223007566
Side View
Table 57.0%Crown 36°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.6%

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 29
Current: $473,427 AUD|Low: $251,268 AUD|High: $476,580 AUD|Avg: $323,640 AUD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 5$251,268 AUD
Retailer 6$270,586 AUD
Retailer 4$277,549 AUD
Retailer 3$288,927 AUD
Retailer 8$293,066 AUD
Retailer 14$301,521 AUD
Retailer 9$314,085 AUD
Retailer 12$314,085 AUD
Retailer 7$323,971 AUD
Retailer 10$326,648 AUD
Retailer 13$339,211 AUD
Retailer 11$362,890 AUD
Retailer 2$365,853 AUD
MOH London$473,427 AUD

31 data points across 14 retailers

17 retailers$270,586 AUD to $473,427 AUD

B+
Cheapest Retailer
-
$270,586 AUD
$190,072 USD
B+
Retailer 2
-
$274,627 AUD
$192,910 USD
View
Retailer 3
-
$277,549 AUD
View
Price last confirmed 31 days ago
B+
Retailer 4
-
$288,927 AUD
$202,955 USD
View
Retailer 5
-
$288,927 AUD
$202,955 USD
View
Price last confirmed 16 days ago
Retailer 6
-
$288,927 AUD
$202,955 USD
View
Price last confirmed 32 days ago
B+
Retailer 7
-
$293,066 AUD
£162,096 GBP
View
B+
Retailer 8
-
$301,521 AUD
$211,802 USD
View
B+
Retailer 9
-
$314,085 AUD
$220,627 USD
View
B+
Retailer 10
-
$314,085 AUD
$220,627 USD
View
B+
Retailer 11
-
$322,688 AUD
$226,670 USD
View
B+
Retailer 12
-
$323,971 AUD
£179,190 GBP
View
B
Retailer 13
-
$326,648 AUD
$229,452 USD
View
B
Retailer 14
-
$339,211 AUD
$238,277 USD
View
B
Retailer 15
-
$362,890 AUD
ZAR 4,118,092 ZAR
View
B
Retailer 16
-
$365,853 AUD
€244,754 EUR
View
Most Expensive
B
MOH London
BE7C8ED7F · Oct 29
$473,427 AUD
£261,855 GBP
View
16 more retailers have this diamond
Prices start from $270,586 AUDSave up to $202,840 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+
6.60ct Round
$270,586 AUD