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0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 839658055

Shape and cutting style on the report: Round brilliant

Certificate IGI 839658055

Diamond specifications and retailer prices

From $377 AUD
As of November 6, 2026
Save $1,636 AUD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,013 AUD at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 839658055. Listed at 11 retailers as of November 4, 2026, with prices from $377 to $2,013, a $1,636 spread on the same certified stone. NZ Jewellers lists it at $2,013. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.3°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 839658055
Dimensions5.02 × 5.04 × 3.22 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
5.02 mm5.04 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839658055
Side View
Table 62.0%Crown 36.3°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.2%

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 6
Current: $2,013 AUD|Low: $377 AUD|High: $2,013 AUD|Avg: $786 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 2$377 AUD
Retailer 9$483 AUD
Retailer 7$586 AUD
Retailer 3$623 AUD
Retailer 5$697 AUD
Retailer 6$707 AUD
Retailer 10$814 AUD
Retailer 4$856 AUD
Retailer 8$1,211 AUD
NZ Jewellers$2,013 AUD

21 data points across 10 retailers

11 retailers$377 AUD to $2,013 AUD

A
Cheapest Retailer
-
$377 AUD
A
Retailer 2
-
$483 AUD
View
Final sale: no returns
B+
Retailer 3
-
$526 AUD
View
B+
Retailer 4
-
$586 AUD
View
A
Retailer 5
-
$623 AUD
View
B+
Retailer 6
-
$697 AUD
View
B+
Retailer 7
-
$707 AUD
View
B+
Retailer 8
-
$814 AUD
View
B+
Retailer 9
-
$856 AUD
View
B
Retailer 10
-
$1,211 AUD
View
Most Expensive
C
NZ Jewellers
f4087ce1-d799-425c-9e0a-733ab293a0cb · Nov 4
$2,013 AUD
$1,409 USD
View
10 more retailers have this diamond
Prices start from $377 AUDSave up to $1,636 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
0.51ct Round
$377 AUD