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0.31ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 146452203

Shape and cutting style on the report: Round brilliant

Certificate IGI 146452203

Diamond specifications and retailer prices

From $253 NZD
₹13,580 INR
As of November 1, 2026
Save $1,431 NZD (85%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $1,684 NZD at NZ Jewellers · As of October 26, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 146452203. Listed at 24 retailers as of October 26, 2026, with prices from $253 to $1,684, a $1,431 spread on the same certified stone. NZ Jewellers lists it at $1,684. 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

0.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.3°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 146452203
Dimensions4.39 × 4.46 × 2.65 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
4.39 mm4.46 mm0.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 146452203
Side View
Table 61.5%Crown 34.3°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $652 NZD|Low: $253 NZD|High: $870 NZD|Avg: $545 NZD|-12.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 3$253 NZD
Retailer 8$377 NZD
Retailer 5$401 NZD
Retailer 9$479 NZD
Retailer 6$575 NZD
Retailer 2$579 NZD
Retailer 1$652 NZD
Retailer 7$742 NZD
Retailer 4$859 NZD

43 data points across 9 retailers

24 retailers$253 NZD to $1,684 NZD

A
Cheapest Retailer
-
$253 NZD
₹13,580 INR
Retailer 2
-
$373 NZD
$210 USD
View
Price last confirmed 58 days ago
Retailer 3
-
$373 NZD
$210 USD
View
Price last confirmed 45 days ago
Retailer 4
-
$373 NZD
$210 USD
View
Price last confirmed 25 days ago
Retailer 5
-
$373 NZD
$210 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$373 NZD
$210 USD
View
Retailer 7
-
$399 NZD
$225 USD
View
Price last confirmed 38 days ago
A
Retailer 8
-
$401 NZD
$226 USD
View
Retailer 9
-
$415 NZD
$234 USD
View
Price last confirmed 33 days ago
A
Retailer 10
-
$415 NZD
$234 USD
View
Retailer 11
-
$479 NZD
$270 USD
View
Price last confirmed 15 days ago
Retailer 12
-
$500 NZD
$282 USD
View
Price last confirmed 56 days ago
Retailer 13
-
$500 NZD
$282 USD
View
Price last confirmed 44 days ago
Retailer 14
-
$500 NZD
$282 USD
View
Price last confirmed 10 days ago
A
Retailer 15
-
$500 NZD
$282 USD
View
Retailer 16
-
$575 NZD
ZAR 5,237 ZAR
View
Price last confirmed 7 days ago
B+
Retailer 17
-
$579 NZD
£257 GBP
View
B+
Retailer 18
-
$602 NZD
$340 USD
View
B+
Retailer 19
-
$652 NZD
€350 EUR
View
B+
Retailer 20
-
$742 NZD
$418 USD
View
B+
Retailer 21
-
$859 NZD
£381 GBP
View
Retailer 22
-
$1,684 NZD
$949 USD
View
Price last confirmed 57 days ago
Retailer 23
-
$1,684 NZD
$949 USD
View
Price last confirmed 44 days ago
Most Expensive
B
NZ Jewellers
f994a225-7a28-4c6d-aed1-513066c0ab63 · Oct 26
$1,684 NZD
$949 USD
View
23 more retailers have this diamond
Prices start from $253 NZDSave up to $1,431 NZD

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.

A
0.31ct Round
$253 NZD