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Cushion|Lab Grown|IGI

3.12ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG653449879

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG653449879

Diamond specifications and retailer prices

From $1,421 NZD
As of November 6, 2026
Save $5,000 NZD (78%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $6,422 NZD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown cushion diamond

This 3.12ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG653449879 or 653449879. Listed at 5 retailers as of November 2, 2026, with prices from $1,421 to $6,422, a $5,000 spread on the same certified stone. Do Amore Diamonds lists it at $6,422. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG653449879
Dimensions8.55 × 8.44 × 5.61 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.55 mm8.44 mm3.12 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG653449879
Side View
Table 61.0%Crown 34.5°Girdle: THN-MEDPavilion 40.1°Culet: NoneDepth 66.5%

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 6
Current: $6,422 NZD|Low: $1,164 NZD|High: $6,422 NZD|Avg: $3,690 NZD|+3.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5$1,421 NZD
Retailer 3$1,425 NZD
Retailer 6$1,910 NZD
Retailer 7$2,529 NZD
Retailer 2$3,635 NZD
Retailer 4$3,662 NZD
Retailer 8$5,610 NZD
Do Amore Diamonds$6,422 NZD

15 data points across 8 retailers

5 retailers$1,421 NZD to $6,422 NZD

B+
Cheapest Retailer
-
$1,421 NZD
A
Retailer 2
-
$1,425 NZD
View
B+
Retailer 3
-
$3,635 NZD
View
B+
Retailer 4
-
$3,662 NZD
View
Most Expensive
B
Do Amore Diamonds
27-8CB5ED9B3 · Nov 2
$6,422 NZD
$3,560 USD
View
4 more retailers have this diamond
Prices start from $1,421 NZDSave up to $5,000 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
3.12ct Cushion
$1,421 NZD