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Round|Natural|GIA

3.18ct M I1 Round Natural Diamond

EX • M/I1 • GIA 5231021840

Certificate GIA 5231021840

Diamond specifications and retailer prices

From $25,463 AUD
As of November 1, 2026
Save $15,938 AUD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $41,401 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 3.18ct natural round diamond

This 3.18ct natural round sits in the three to five carat band, graded M colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 5231021840. Listed at 9 retailers as of November 1, 2026, with prices from $25,463 to $41,401, a $15,938 spread on the same certified stone. NZ Jewellers lists it at $41,401. At this carat range, natural pricing varies dramatically across retailers, so the cross-retailer spread on this exact stone is your single best indicator of fair price.

The 4Cs

3.18
Carat
M
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5231021840
Dimensions9.57 × 9.54 × 5.76 mm
L/W Ratio1.00
Top View
9.57 mm9.54 mm3.18 ctM / I1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5231021840
Side View
Table 56.0%CrownGirdle: THN-STKPavilionCulet: NoneDepth 60.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $41,401 AUD|Low: $25,463 AUD|High: $41,401 AUD|Avg: $31,652 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 3$25,463 AUD
Retailer 9$26,480 AUD
Retailer 4$26,866 AUD
Retailer 6$29,224 AUD
Retailer 5$30,686 AUD
Retailer 8$31,660 AUD
Retailer 7$32,877 AUD
Retailer 2$33,955 AUD
Retailer 10$36,760 AUD
NZ Jewellers$41,401 AUD

23 data points across 10 retailers

9 retailers$25,463 AUD to $41,401 AUD

B
Cheapest Retailer
-
$25,463 AUD
B
Retailer 2
-
$26,866 AUD
View
Retailer 3
-
$29,224 AUD
View
Price last confirmed 8 days ago
C
Retailer 4
-
$30,686 AUD
View
C
Retailer 5
-
$31,660 AUD
View
C
Retailer 6
-
$32,877 AUD
View
C
Retailer 7
-
$33,955 AUD
View
C
Retailer 8
-
$34,054 AUD
View
Most Expensive
C
NZ Jewellers
aa35406b-0523-45f1-9395-f1aad5eda815 · Nov 5
$41,401 AUD
$28,982 USD
View
8 more retailers have this diamond
Prices start from $25,463 AUDSave up to $15,938 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
$25,463 AUD