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Round|Natural|IGI

4.01ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 605300501

Certificate IGI 605300501

Diamond specifications and retailer prices

From $23,113 AUD
As of November 5, 2026
Save $17,347 AUD (43%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $40,460 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 4.01ct natural round diamond

This 4.01ct 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 IGI 605300501. Listed at 13 retailers as of November 4, 2026, with prices from $23,113 to $40,460, a $17,347 spread on the same certified stone. MOH London lists it at $40,460. 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

4.01
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 605300501
Dimensions10.09 × 10.02 × 6.35 mm
L/W Ratio1.01
Top View
10.09 mm10.02 mm4.01 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 605300501
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $40,460 AUD|Low: $23,113 AUD|High: $41,057 AUD|Avg: $29,461 AUD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4$23,113 AUD
Retailer 6$26,360 AUD
Retailer 2$26,972 AUD
Retailer 7$27,329 AUD
Retailer 5$27,991 AUD
Retailer 8$30,107 AUD
Retailer 3$31,276 AUD
MOH London$40,460 AUD

40 data points across 8 retailers

13 retailers$23,113 AUD to $40,460 AUD

A
Cheapest Retailer
-
$23,113 AUD
A
Retailer 2
-
$26,360 AUD
View
A
Retailer 3
-
$26,972 AUD
View
Retailer 4
-
$27,249 AUD
View
Price last confirmed 72 days ago
A
Retailer 5
-
$27,991 AUD
View
Retailer 6
-
$28,673 AUD
View
Price last confirmed 8 days ago
A
Retailer 7
-
$30,107 AUD
View
A
Retailer 8
-
$31,063 AUD
View
A
Retailer 9
-
$31,276 AUD
View
B+
Retailer 10
-
$31,878 AUD
View
B+
Retailer 11
-
$32,257 AUD
View
B+
Retailer 12
-
$36,800 AUD
View
Most Expensive
B+
MOH London
2EF3E7210 · Nov 4
$40,460 AUD
£22,302 GBP
View
12 more retailers have this diamond
Prices start from $23,113 AUDSave up to $17,347 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
4.01ct Round
$23,113 AUD