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Round|Natural|GIA

1.40ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6541638434

Certificate GIA 6541638434

Diamond specifications and retailer prices

From $4,585 AUD
As of November 5, 2026
Save $3,367 AUD (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $8,308 AUD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1.4ct natural round diamond

This 1.4ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6541638434. Listed at 11 retailers as of November 4, 2026, with a 73% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.40
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6541638434
Dimensions7.14 × 7.09 × 4.43 mm
L/W Ratio1.01
Star length50%
Top View
7.14 mm7.09 mm1.40 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6541638434
Side View
Table 58.0%Crown 36°GirdlePavilion 40.6°Culet: NoneDepth 62.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $4,874 AUD|Low: $4,585 AUD|High: $8,565 AUD|Avg: $5,787 AUD|-5.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$4,585 AUD
Retailer 1$4,874 AUD
Retailer 2$5,538 AUD
Retailer 3$5,551 AUD
Retailer 4$5,820 AUD
Retailer 5$7,952 AUD

44 data points across 6 retailers

11 retailers$4,585 AUD to $7,952 AUD

B+
Cheapest Retailer
-
$4,585 AUD
Retailer 2
-
$4,768 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$4,768 AUD
View
Price last confirmed 29 days ago
B+
Retailer 4
-
$4,874 AUD
View
Retailer 5
-
$4,951 AUD
View
Price last confirmed 38 days ago
Retailer 6
-
$5,503 AUD
View
Price last confirmed 38 days ago
B
Retailer 7
-
$5,538 AUD
View
B+
Retailer 8
-
$5,551 AUD
View
B
Retailer 9
-
$5,820 AUD
View
B
Retailer 10
-
$7,952 AUD
View
Most Expensive
NZ Jewellers
335be264-81b7-4ae0-b9b7-ad49c3fbd800 · Sep 26
$8,308 AUD
$5,816 USD
View
Price last confirmed 40 days ago
10 more retailers have this diamond
Prices start from $4,585 AUDSave up to $3,367 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+
1.40ct Round
$4,585 AUD