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Round|Natural|GIA

4.25ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6541127304

Certificate GIA 6541127304

Diamond specifications and retailer prices

From $49,862 AUD
As of October 31, 2026
Save $35,670 AUD (42%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $85,532 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 4.25ct natural round diamond

This 4.25ct 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 GIA 6541127304. Listed at 23 retailers as of October 31, 2026, with prices from $49,862 to $85,532, a $35,670 spread on the same certified stone. MOH London lists it at $85,532. 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

4.25
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6541127304
Dimensions10.40 × 10.31 × 6.40 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
10.40 mm10.31 mm4.25 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541127304
Side View
Table 60.0%Crown 33°Girdle: Slightly ThickPavilion 41.8°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
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 31
Current: $85,532 AUD|Low: $49,862 AUD|High: $89,639 AUD|Avg: $63,339 AUD|-4.3%
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
November 5, 2026
Retailer 14$49,862 AUD
Retailer 13$49,979 AUD
Retailer 3$50,119 AUD
Retailer 2$51,056 AUD
Retailer 11$51,633 AUD
Retailer 4$53,037 AUD
Retailer 9$53,922 AUD
Retailer 8$54,306 AUD
Retailer 5$56,547 AUD
Retailer 10$58,567 AUD
Retailer 6$65,460 AUD
Retailer 7$66,081 AUD
Retailer 12$68,631 AUD
MOH London$85,532 AUD

36 data points across 14 retailers

23 retailers$49,862 AUD to $85,532 AUD

A
Cheapest Retailer
-
$49,862 AUD
A
Retailer 2
-
$49,979 AUD
View
A
Retailer 3
-
$50,119 AUD
View
A
Retailer 4
-
$51,056 AUD
View
A
Retailer 5
-
$51,633 AUD
View
A
Retailer 6
-
$53,037 AUD
View
B+
Retailer 7
-
$53,922 AUD
View
A
Retailer 8
-
$54,306 AUD
View
B+
Retailer 9
-
$56,547 AUD
View
Retailer 10
-
$56,713 AUD
View
Price last confirmed 21 days ago
B+
Retailer 11
-
$58,567 AUD
View
Retailer 12
-
$59,077 AUD
View
Price last confirmed 48 days ago
Retailer 13
-
$59,077 AUD
View
Price last confirmed 20 days ago
Retailer 14
-
$59,077 AUD
View
Price last confirmed 22 days ago
Retailer 15
-
$61,440 AUD
View
Price last confirmed 45 days ago
Retailer 16
-
$61,440 AUD
View
Price last confirmed 19 days ago
Retailer 17
-
$63,488 AUD
View
Price last confirmed 14 days ago
Retailer 18
-
$63,803 AUD
View
Price last confirmed 45 days ago
Retailer 19
-
$63,803 AUD
View
Price last confirmed 19 days ago
Retailer 20
-
$65,460 AUD
View
Price last confirmed 10 days ago
B+
Retailer 21
-
$66,081 AUD
View
B
Retailer 22
-
$68,631 AUD
View
Most Expensive
B
MOH London
5243C3FC5 · Nov 2
$85,532 AUD
£47,146 GBP
View
22 more retailers have this diamond
Prices start from $49,862 AUDSave up to $35,670 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
4.25ct Round
$49,862 AUD