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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 €15,881 EUR
As of November 1, 2026
Save €9,940 EUR (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €25,822 EUR 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 €15,881 to €25,822, a €9,940 spread on the same certified stone. NZ Jewellers lists it at €25,822. 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: €25,822 EUR|Low: €15,881 EUR|High: €25,822 EUR|Avg: €19,741 EUR
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€15,881 EUR
Retailer 9€16,516 EUR
Retailer 4€16,756 EUR
Retailer 6€18,227 EUR
Retailer 5€19,138 EUR
Retailer 8€19,746 EUR
Retailer 7€20,505 EUR
Retailer 2€21,178 EUR
Retailer 10€22,927 EUR
NZ Jewellers€25,822 EUR

23 data points across 10 retailers

9 retailers€15,881 EUR to €25,822 EUR

B
Cheapest Retailer
-
€15,881 EUR
B
Retailer 2
-
€16,756 EUR
View
Retailer 3
-
€18,227 EUR
View
Price last confirmed 8 days ago
C
Retailer 4
-
€19,138 EUR
View
C
Retailer 5
-
€19,746 EUR
View
C
Retailer 6
-
€20,505 EUR
View
C
Retailer 7
-
€21,178 EUR
View
C
Retailer 8
-
€21,239 EUR
View
Most Expensive
C
NZ Jewellers
aa35406b-0523-45f1-9395-f1aad5eda815 · Nov 5
€25,822 EUR
$28,982 USD
View
8 more retailers have this diamond
Prices start from €15,881 EURSave up to €9,940 EUR

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
€15,881 EUR