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Cushion|Lab Grown|IGI

3.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG823696410

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG823696410

Diamond specifications and retailer prices

From $736 SGD
HK$4,500 HKD
As of October 30, 2026
Save $2,818 SGD (79%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,554 SGD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.51ct lab-grown cushion diamond

This 3.51ct 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 LG823696410 or 823696410. Listed at 12 retailers as of October 30, 2026, with prices from $736 to $3,554, a $2,818 spread on the same certified stone. Brilliant Earth lists it at $3,554. 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

3.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823696410
Dimensions10.54 × 7.56 × 5.12 mm
L/W Ratio1.39
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.54 mm7.56 mm3.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823696410
Side View
Table 63.0%Crown 36.3°Girdle: MED-THKPavilion 36.4°Culet: NoneDepth 67.7%

Caratlytics Score

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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: $3,554 SGD|Low: $623 SGD|High: $6,699 SGD|Avg: $1,990 SGD|-46.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 5$623 SGD
Retailer 2$736 SGD
Retailer 9$849 SGD
Retailer 8$876 SGD
Retailer 6$1,048 SGD
Retailer 3$1,088 SGD
Retailer 10$1,134 SGD
Retailer 13$1,672 SGD
Retailer 4$1,737 SGD
Retailer 7$2,171 SGD
Retailer 11$2,543 SGD
Retailer 12$3,439 SGD
Brilliant Earth$3,554 SGD

40 data points across 13 retailers

12 retailers$736 SGD to $3,554 SGD

A
Cheapest Retailer
-
$736 SGD
HK$4,500 HKD
A
Retailer 2
-
$849 SGD
£523 GBP
View
A
Retailer 3
-
$876 SGD
$685 USD
View
A
Retailer 4
-
$1,048 SGD
€781 EUR
View
B+
Retailer 5
-
$1,088 SGD
$851 USD
View
A
Retailer 6
-
$1,134 SGD
£699 GBP
View
B+
Retailer 7
-
$1,672 SGD
$1,308 USD
View
B+
Retailer 8
-
$1,737 SGD
$1,359 USD
View
B+
Retailer 9
-
$2,171 SGD
View
B+
Retailer 10
-
$2,543 SGD
£1,566 GBP
View
B
Retailer 11
-
$3,439 SGD
$2,690 USD
View
Most Expensive
B
Brilliant Earth
20881638A · Oct 30
$3,554 SGD
$2,780 USD
View
11 more retailers have this diamond
Prices start from $736 SGDSave up to $2,818 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
3.51ct Cushion
$736 SGD