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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 $1,007 SGD
$788 USD
As of October 30, 2026
Save $3,544 SGD (78%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $4,551 SGD at Do Amore Diamonds · As of October 29, 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 October 29, 2026, with prices from $1,007 to $4,551, a $3,544 spread on the same certified stone. Do Amore Diamonds lists it at $4,551. 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: Oct 30
Current: $4,551 SGD|Low: $805 SGD|High: $4,551 SGD|Avg: $2,596 SGD|+3.2%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 29, 2026
Retailer 5$1,007 SGD
Retailer 3$1,010 SGD
Retailer 6$1,354 SGD
Retailer 7$1,793 SGD
Retailer 2$2,590 SGD
Retailer 4$2,595 SGD
Retailer 8$3,976 SGD
Do Amore Diamonds$4,551 SGD

16 data points across 8 retailers

5 retailers$1,007 SGD to $4,551 SGD

B+
Cheapest Retailer
-
$1,007 SGD
$788 USD
A
Retailer 2
-
$1,010 SGD
$790 USD
View
B+
Retailer 3
-
$2,590 SGD
£1,595 GBP
View
B+
Retailer 4
-
$2,595 SGD
$2,030 USD
View
Most Expensive
B
Do Amore Diamonds
27-8CB5ED9B3 · Oct 29
$4,551 SGD
$3,560 USD
View
4 more retailers have this diamond
Prices start from $1,007 SGDSave up to $3,544 SGD

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
$1,007 SGD