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Round|Natural|IGI

0.31ct J I1 Round Natural Diamond

EX • J/I1 • IGI 320851903

Shape and cutting style on the report: Round brilliant

Certificate IGI 320851903

Diamond specifications and retailer prices

From $172 USD
As of October 31, 2026
Save $606 USD (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $778 USD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.31ct natural round diamond

This 0.31ct natural round sits in the sub-half-carat band, graded J colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI 320851903. Listed at 8 retailers as of October 30, 2026, with prices from $172 to $778, a $606 spread on the same certified stone. NZ Jewellers lists it at $778. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.31
Carat
J
Color
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.4°
OriginNatural
Grading LabIGI
CertificateIGI 320851903
Dimensions4.39 × 4.43 × 2.59 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
4.39 mm4.43 mm0.31 ctJ / I1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI 320851903
Side View
Table 62.5%Crown 34.3°Girdle: UNDPavilion 40.4°Culet: NoneDepth 58.8%

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: Oct 31
Current: $310 USD|Low: $166 USD|High: $313 USD|Avg: $239 USD|+3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2$168 USD
Retailer 3$218 USD
Retailer 4$262 USD
Retailer 1$310 USD

19 data points across 4 retailers

8 retailers$172 USD to $778 USD

B+
Cheapest Retailer
-
$172 USD
B+
Retailer 2
-
$185 USD
View
B+
Retailer 3
-
$192 USD
View
B+
Retailer 4
-
$212 USD
View
B+
Retailer 5
-
$218 USD
View
B+
Retailer 6
-
$231 USD
View
B
Retailer 7
-
$310 USD
€295 EUR
View
Most Expensive
C
NZ Jewellers
6201fe03-5bad-4a38-991d-5938059b446a · Oct 30
$778 USD
View
7 more retailers have this diamond
Prices start from $172 USDSave up to $606 USD

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+
0.31ct Round
$172 USD