Round|Natural|GIA

1.40ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2537732539

Certificate GIA 2537732539

Diamond specifications and retailer prices

From $4,857 AUD
As of November 5, 2026
Save $3,560 AUD (42%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,944 AUD at NZ Jewellers · As of September 12, 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 2537732539. Listed at 14 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 angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2537732539
Dimensions7.11 × 7.06 × 4.42 mm
L/W Ratio1.01
Star length50%
Top View
7.11 mm7.06 mm1.40 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537732539
Side View
Table 59.0%Crown 36°GirdlePavilion 40.8°Culet: NoneDepth 62.4%

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: $5,190 AUD|Low: $4,857 AUD|High: $8,584 AUD|Avg: $5,947 AUD|+0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 6$4,857 AUD
Retailer 7$5,134 AUD
Retailer 1$5,190 AUD
Retailer 2$5,850 AUD
Retailer 4$5,863 AUD
Retailer 3$6,160 AUD
Retailer 5$8,417 AUD

42 data points across 7 retailers

14 retailers$4,857 AUD to $8,417 AUD

B+
Cheapest Retailer
-
$4,857 AUD
Retailer 2
-
$5,047 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$5,047 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$5,134 AUD
View
Price last confirmed 55 days ago
B+
Retailer 5
-
$5,190 AUD
View
Retailer 6
-
$5,241 AUD
View
Price last confirmed 38 days ago
Retailer 7
-
$5,823 AUD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$5,850 AUD
View
B+
Retailer 9
-
$5,863 AUD
View
Retailer 10
-
$5,923 AUD
View
Price last confirmed 56 days ago
B
Retailer 11
-
$6,160 AUD
View
B
Retailer 12
-
$8,417 AUD
View
Retailer 13
-
$8,792 AUD
View
Price last confirmed 41 days ago
Most Expensive
NZ Jewellers
1f564d4d-8326-4a62-ae83-982157bd16b6 · Sep 12
$8,944 AUD
$6,261 USD
View
Price last confirmed 54 days ago
13 more retailers have this diamond
Prices start from $4,857 AUDSave up to $3,560 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
$4,857 AUD