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Round|Natural|GIA

1.40ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 2558103659

Certificate GIA 2558103659

Diamond specifications and retailer prices

From $2,358 AUD
As of November 4, 2026
Save $4,347 AUD (65%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,977 AUD at NZ Jewellers · As of September 25, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558103659. Listed at 14 retailers as of November 4, 2026, with a 184% 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558103659
Dimensions7.12 × 7.06 × 4.45 mm
L/W Ratio1.01
Top View
7.12 mm7.06 mm1.40 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2558103659
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.8%

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 4
Current: $6,705 AUD|Low: $2,340 AUD|High: $6,977 AUD|Avg: $3,692 AUD|-3.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 10$2,358 AUD
Retailer 12$2,607 AUD
Retailer 8$2,961 AUD
Retailer 2$3,154 AUD
Retailer 3$3,221 AUD
Retailer 13$3,248 AUD
Retailer 11$3,337 AUD
Retailer 4$3,443 AUD
Retailer 7$3,524 AUD
Retailer 5$3,914 AUD
Retailer 6$3,914 AUD
Retailer 9$4,787 AUD
NZ Jewellers$6,705 AUD

39 data points across 13 retailers

14 retailers$2,358 AUD to $6,705 AUD

A
Cheapest Retailer
-
$2,358 AUD
Retailer 2
-
$2,607 AUD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$2,961 AUD
View
Final sale: no returns
B+
Retailer 4
-
$3,154 AUD
View
B+
Retailer 5
-
$3,221 AUD
View
B+
Retailer 6
-
$3,248 AUD
View
B+
Retailer 7
-
$3,321 AUD
View
B+
Retailer 8
-
$3,337 AUD
View
B+
Retailer 9
-
$3,443 AUD
View
B+
Retailer 10
-
$3,524 AUD
View
B
Retailer 11
-
$3,914 AUD
View
B
Retailer 12
-
$4,787 AUD
View
B
Retailer 13
-
$6,705 AUD
View
Most Expensive
NZ Jewellers
24342ae1-9916-4907-a630-cfa04c6aec93 · Sep 25
$6,977 AUD
$4,884 USD
View
Price last confirmed 41 days ago
13 more retailers have this diamond
Prices start from $2,358 AUDSave up to $4,347 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
1.40ct Round
$2,358 AUD