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Round|Natural|GIA

0.50ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 2427521846

Certificate GIA 2427521846

Diamond specifications and retailer prices

From $334 AUD
As of November 5, 2026
Save $431 AUD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,761 AUD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.5ct natural round diamond

This 0.5ct natural round sits in the half to three-quarter carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2427521846. Listed at 8 retailers as of November 5, 2026, with a 129% 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

0.50
Carat
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 2427521846
Dimensions5.04 × 5.08 × 3.20 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
5.04 mm5.08 mm0.50 ctM / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2427521846
Side View
Table 58.0%Crown 34.5°Girdle: STK-STKPavilion 41.8°Culet: NoneDepth 63.1%

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 5
Current: $766 AUD|Low: $334 AUD|High: $853 AUD|Avg: $531 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 2$334 AUD
Retailer 5$401 AUD
Retailer 4$496 AUD
Retailer 3$637 AUD
Retailer 1$766 AUD

45 data points across 5 retailers

8 retailers$334 AUD to $766 AUD

A
Cheapest Retailer
-
$334 AUD
B+
Retailer 2
-
$401 AUD
View
Retailer 3
-
$460 AUD
View
Price last confirmed 36 days ago
Retailer 4
-
$513 AUD
View
Price last confirmed 38 days ago
Retailer 5
-
$619 AUD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$637 AUD
View
B
Retailer 7
-
$766 AUD
View
Most Expensive
NZ Jewellers
315668e2-20c6-4b9f-9f67-eab3941e6d00 · Sep 28
$1,761 AUD
$1,233 USD
View
Price last confirmed 39 days ago
7 more retailers have this diamond
Prices start from $334 AUDSave up to $431 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
0.50ct Round
$334 AUD