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Cushion|Lab Grown|IGI

1.78ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG846664592

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG846664592

Diamond specifications and retailer prices

From $862 SGD
£531 GBP
As of October 30, 2026
Save $7,192 SGD (89%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $8,054 SGD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.78ct lab-grown cushion diamond

This 1.78ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846664592 or 846664592. Listed at 3 retailers as of October 30, 2026, with prices from $862 to $8,054, a $7,192 spread on the same certified stone. Brilliant Earth lists it at $8,054. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle35.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846664592
Dimensions8.63 × 6.22 × 4.30 mm
L/W Ratio1.39
Girdle conditionFaceted
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
8.63 mm6.22 mm1.78 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846664592
Side View
Table 57.0%Crown 33.8°Girdle: MED-STKPavilion 35.7°CuletDepth 69.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $8,054 SGD|Low: $862 SGD|High: $8,054 SGD|Avg: $4,782 SGD
Brilliant Earth
Retailer 2
Retailer 3
October 31, 2026
Retailer 3$862 SGD
Retailer 2$6,079 SGD
Brilliant Earth$8,054 SGD

2 data points across 3 retailers

3 retailers$862 SGD to $8,054 SGD

A
Cheapest Retailer
-
$862 SGD
£531 GBP
B
Retailer 2
-
$6,079 SGD
$4,755 USD
View
Most Expensive
B
Brilliant Earth
22370033A · Oct 30
$8,054 SGD
$6,300 USD
View
2 more retailers have this diamond
Prices start from $862 SGDSave up to $7,192 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
1.78ct Cushion
$862 SGD