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Round|Natural|GIA

3.12ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2484226945

Certificate GIA 2484226945

Diamond specifications and retailer prices

From $47,738 NZD
CA$37,369 CAD
As of October 30, 2026
Save $31,400 NZD (40%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $79,138 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 3.12ct natural round diamond

This 3.12ct natural round sits in the three to five carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2484226945. Listed at 7 retailers as of October 30, 2026, with prices from $47,738 to $79,138, a $31,400 spread on the same certified stone. MOH London lists it at $79,138. 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

3.12
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2484226945
Dimensions9.37 × 9.36 × 5.76 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
9.37 mm9.36 mm3.12 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2484226945
Side View
Table 60.0%Crown 35.5°Girdle: ThickPavilion 41.2°Culet: NoneDepth 61.5%

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 30
Current: $79,138 NZD|Low: $44,100 NZD|High: $80,093 NZD|Avg: $56,602 NZD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4$44,100 NZD
Retailer 5$45,424 NZD
Retailer 3$50,723 NZD
Retailer 2$57,999 NZD
MOH London$79,138 NZD

40 data points across 5 retailers

7 retailers$47,738 NZD to $79,138 NZD

Retailer 1
-
$44,100 NZD
$24,855 USD
Price last confirmed 7 days ago
B+
Retailer 2
-
$47,738 NZD
CA$37,369 CAD
View
B+
Retailer 3
-
$50,723 NZD
£22,510 GBP
View
B
Retailer 4
-
$55,614 NZD
$31,344 USD
View
B
Retailer 5
-
$57,999 NZD
€31,132 EUR
View
B
Retailer 6
-
$59,198 NZD
$33,364 USD
View
Most Expensive
B
MOH London
7B04EAEF3 · Nov 1
$79,138 NZD
£35,120 GBP
View
6 more retailers have this diamond
Prices start from $47,738 NZDSave up to $31,400 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.

B+
3.12ct Round
$47,738 NZD