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Round|Natural|GIA

3.18ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2554362699

Certificate GIA 2554362699

Diamond specifications and retailer prices

From $72,268 AUD
$50,764 USD
As of November 1, 2026
2 retailers carry this diamond
Most expensive: $72,268 AUD at Diamonds Direct
View at Diamonds Direct

About this 3.18ct natural round diamond

This 3.18ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554362699. Listed at 2 retailers as of November 1, 2026. 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

3.18
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554362699
Dimensions9.32 × 9.37 × 5.86 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Key to symbols
Cloud, Feather, Crystal, Needle
Top View
9.32 mm9.37 mm3.18 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554362699
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°CuletDepth 62.7%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 1
Current: $72,268 AUD|Low: $46,082 AUD|High: $102,767 AUD|Avg: $64,189 AUD|+8.9%
Diamonds Direct
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 2$46,082 AUD
Retailer 3$49,560 AUD
Retailer 6$55,418 AUD
Retailer 4$58,677 AUD
Diamonds Direct$72,268 AUD
Retailer 5$102,767 AUD

28 data points across 6 retailers

2 retailers

Retailer 1
-
$46,082 AUD
$32,370 USD
Price last confirmed 15 days ago
Most Expensive
C
Diamonds Direct
1014396 · Nov 1
$72,268 AUD
$50,764 USD
View
1 more retailer has this diamond

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.

C
3.18ct Round
$72,268 AUD