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Cushion|Lab Grown|IGI

3.12ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG567368333

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG567368333

Diamond specifications and retailer prices

From $1,299 NZD
As of November 5, 2026
Save $3,391 NZD (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $6,804 NZD at B2C Jewels · As of October 26, 2026
View at B2C Jewels

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 LG567368333 or 567368333. Listed at 9 retailers as of November 5, 2026, with a 261% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG567368333
Dimensions8.75 × 8.39 × 5.20 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.75 mm8.39 mm3.12 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG567368333
Side View
Table 62.5%Crown 35°Girdle: THN-STKPavilion 35.1°Culet: NoneDepth 62.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $1,779 NZD|Low: $1,299 NZD|High: $6,804 NZD|Avg: $2,343 NZD|-73.9%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 5$1,299 NZD
Retailer 4$1,376 NZD
Retailer 6$1,752 NZD
B2C Jewels$1,779 NZD
Retailer 3$1,858 NZD
Retailer 7$1,961 NZD
Retailer 8$3,669 NZD
Retailer 2$4,690 NZD

11 data points across 8 retailers

9 retailers$1,299 NZD to $4,690 NZD

A
Cheapest Retailer
-
$1,299 NZD
A
Retailer 2
-
$1,376 NZD
View
A
Retailer 3
-
$1,752 NZD
View
A
Retailer 4
-
$1,779 NZD
View
A
Retailer 5
-
$1,858 NZD
View
A
Retailer 6
-
$1,961 NZD
View
B
Retailer 7
-
$3,788 NZD
View
B
Retailer 8
-
$4,690 NZD
View
Most Expensive
B2C Jewels
21586996 · Oct 26
$6,804 NZD
$3,772 USD
View
Price last confirmed 11 days ago
8 more retailers have this diamond
Prices start from $1,299 NZDSave up to $3,391 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
$1,299 NZD