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Round|Natural|GIA

4.25ct K SI1 Round Natural Diamond

EX • K/SI1

Diamond specifications and retailer prices

From $44,338 SGD
As of November 4, 2026
Save $10,912 SGD (20%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $57,049 SGD at Aurelinne · As of October 23, 2026
View at Aurelinne

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. Listed at 15 retailers as of November 4, 2026, with a relatively tight 25% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
OriginNatural
Grading LabGIA
Dimensions10.31 × 10.40 × 6.40 mm
L/W Ratio1.01
Top View
10.31 mm10.40 mm4.25 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 60.0%CrownGirdle: Slightly ThickPavilionCulet: 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: Nov 4
Current: $55,091 SGD|Low: $44,338 SGD|High: $57,155 SGD|Avg: $53,143 SGD|-3.4%
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5$44,338 SGD
Retailer 8$49,209 SGD
Retailer 10$50,710 SGD
Retailer 4$50,900 SGD
Retailer 2$51,010 SGD
Retailer 3$51,010 SGD
Retailer 6$53,051 SGD
Retailer 7$53,203 SGD
Aurelinne$55,091 SGD
Retailer 9$55,250 SGD

19 data points across 10 retailers

15 retailers$44,338 SGD to $55,250 SGD

A
Cheapest Retailer
-
$44,338 SGD
Retailer 2
-
$45,895 SGD
View
Price last confirmed 14 days ago
B+
Retailer 3
-
$49,209 SGD
View
Retailer 4
-
$50,710 SGD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$50,900 SGD
View
B+
Retailer 6
-
$51,010 SGD
View
B+
Retailer 7
-
$51,010 SGD
View
Retailer 8
-
$52,824 SGD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
$53,051 SGD
View
B+
Retailer 10
-
$53,203 SGD
View
Retailer 11
-
$54,937 SGD
View
Price last confirmed 15 days ago
Retailer 12
-
$55,038 SGD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
$55,091 SGD
View
B+
Retailer 14
-
$55,250 SGD
View
Most Expensive
Aurelinne
ef843a20-8ae8-4ab8-b564-142ec00080e9 · Oct 23
$57,049 SGD
$44,664 USD
View
Price last confirmed 14 days ago
14 more retailers have this diamond
Prices start from $44,338 SGDSave up to $10,912 SGD

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
$44,338 SGD