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Round|Natural|GIA

0.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5553958574

Certificate GIA 5553958574

Diamond specifications and retailer prices

From $381 AUD
As of November 5, 2026
Save $829 AUD (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,368 AUD at NZ Jewellers · As of October 6, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5553958574. Listed at 9 retailers as of November 2, 2026, with a 217% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5553958574
Dimensions5.08 × 5.11 × 3.15 mm
L/W Ratio1.01
Girdle conditionMedium to Slightly Thick
Key to symbols
Crystal, Cavity
Top View
5.08 mm5.11 mm0.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553958574
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.8%

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 5
Current: $556 AUD|Low: $381 AUD|High: $1,440 AUD|Avg: $751 AUD|-14.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 3$381 AUD
Retailer 6$457 AUD
Retailer 1$556 AUD
Retailer 7$619 AUD
Retailer 2$860 AUD
Retailer 4$911 AUD
Retailer 5$1,210 AUD

40 data points across 7 retailers

9 retailers$381 AUD to $1,210 AUD

A
Cheapest Retailer
-
$381 AUD
A
Retailer 2
-
$457 AUD
View
A
Retailer 3
-
$556 AUD
View
Retailer 4
-
$601 AUD
View
Price last confirmed 38 days ago
Retailer 5
-
$619 AUD
View
Price last confirmed 30 days ago
B+
Retailer 6
-
$860 AUD
View
B+
Retailer 7
-
$911 AUD
View
B
Retailer 8
-
$1,210 AUD
View
Most Expensive
NZ Jewellers
08755ef6-4acd-4248-92f6-dcc8886bc2a6 · Oct 6
$2,368 AUD
$1,658 USD
View
Price last confirmed 31 days ago
8 more retailers have this diamond
Prices start from $381 AUDSave up to $829 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
$381 AUD