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Round|Natural|GIA

3.18ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 5221017633

Certificate GIA 5221017633

Diamond specifications and retailer prices

From $46,331 AUD
$32,545 USD
As of November 1, 2026
Save $13,058 AUD (22%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $59,389 AUD at Yorxs · As of November 1, 2026
View at Yorxs

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 5221017633. Listed at 7 retailers as of November 1, 2026, with prices from $46,331 to $59,389, a $13,058 spread on the same certified stone. Yorxs lists it at $59,389. 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
FluorescenceFaint
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 5221017633
Dimensions9.29 × 9.35 × 5.85 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
9.29 mm9.35 mm3.18 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5221017633
Side View
Table 57.0%Crown 36°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $54,485 AUD|Low: $45,067 AUD|High: $64,283 AUD|Avg: $52,832 AUD|-10.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Yorxs
November 1, 2026
Retailer 3$46,331 AUD
Retailer 2$49,574 AUD
Retailer 5$52,972 AUD
Retailer 6$52,972 AUD
Retailer 1$54,485 AUD
Retailer 4$54,737 AUD
Yorxs$59,389 AUD

37 data points across 7 retailers

7 retailers$46,331 AUD to $59,389 AUD

B+
Cheapest Retailer
-
$46,331 AUD
$32,545 USD
B+
Retailer 2
-
$49,574 AUD
$34,823 USD
View
Final sale: no returns
B+
Retailer 3
-
$52,972 AUD
$37,210 USD
View
B+
Retailer 4
-
$52,972 AUD
$37,210 USD
View
B+
Retailer 5
-
$54,485 AUD
£30,136 GBP
View
B
Retailer 6
-
$54,737 AUD
$38,450 USD
View
Most Expensive
B
Yorxs
900-10-32988 · Nov 1
$59,389 AUD
€39,731 EUR
View
6 more retailers have this diamond
Prices start from $46,331 AUDSave up to $13,058 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.

B+
3.18ct Round
$46,331 AUD