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Round|Natural|IGI

0.51ct L SI2 Round Natural Diamond

EX • L/SI2 • IGI 638418320

Shape and cutting style on the report: Round brilliant

Certificate IGI 638418320

Diamond specifications and retailer prices

From $387 AUD
As of November 5, 2026
Save $1,363 AUD (78%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,750 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 L colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 638418320. Listed at 9 retailers as of November 4, 2026, with prices from $387 to $1,750, a $1,363 spread on the same certified stone. NZ Jewellers lists it at $1,750. 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
L
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle36.2°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 638418320
Dimensions5.07 × 5.10 × 3.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
5.07 mm5.10 mm0.51 ctL / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateIGI 638418320
Side View
Table 63.0%Crown 36.2°Girdle: MED-STKPavilion 41.4°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: $1,750 AUD|Low: $387 AUD|High: $1,750 AUD|Avg: $635 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 7$387 AUD
Retailer 5$406 AUD
Retailer 9$416 AUD
Retailer 4$431 AUD
Retailer 8$520 AUD
Retailer 6$526 AUD
Retailer 11$571 AUD
Retailer 3$580 AUD
Retailer 2$661 AUD
Retailer 10$677 AUD
NZ Jewellers$1,750 AUD

15 data points across 11 retailers

9 retailers$387 AUD to $1,750 AUD

A
Cheapest Retailer
-
$387 AUD
Retailer 2
-
$416 AUD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$431 AUD
View
Retailer 4
-
$511 AUD
View
Price last confirmed 14 days ago
B+
Retailer 5
-
$520 AUD
View
B+
Retailer 6
-
$526 AUD
View
B+
Retailer 7
-
$571 AUD
View
B+
Retailer 8
-
$661 AUD
View
Most Expensive
C
NZ Jewellers
8a4e0068-c8d5-44ca-8bd6-925b1c914e4b · Nov 4
$1,750 AUD
$1,225 USD
View
8 more retailers have this diamond
Prices start from $387 AUDSave up to $1,363 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
$387 AUD