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Cushion|Lab Grown|IGI

1.78ct D FL Cushion Lab Grown Diamond

EX • D/FL • IGI LG784646409

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG784646409

Diamond specifications and retailer prices

From $1,097 SGD
$858 USD
As of November 1, 2026
Save $5,538 SGD (83%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,635 SGD at Do Amore Diamonds · As of November 1, 2026
View at Do Amore Diamonds

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 LG784646409 or 784646409. Listed at 10 retailers as of November 1, 2026, with prices from $1,097 to $6,635, a $5,538 spread on the same certified stone. Do Amore Diamonds lists it at $6,635. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784646409
Dimensions7.19 × 7.02 × 4.57 mm
L/W Ratio1.02
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
7.19 mm7.02 mm1.78 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784646409
Side View
Table 64.0%Crown 34.2°Girdle: STK-THKPavilion 38.7°Culet: NoneDepth 65.1%

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 1
Current: $6,635 SGD|Low: $1,097 SGD|High: $8,795 SGD|Avg: $3,068 SGD|-24.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 6$1,097 SGD
Retailer 8$1,112 SGD
Retailer 10$1,161 SGD
Retailer 5$1,425 SGD
Retailer 9$1,478 SGD
Retailer 2$1,638 SGD
Retailer 7$3,829 SGD
Retailer 4$4,038 SGD
Retailer 3$4,705 SGD
Do Amore Diamonds$6,635 SGD

28 data points across 10 retailers

10 retailers$1,097 SGD to $6,635 SGD

A
Cheapest Retailer
-
$1,097 SGD
$858 USD
A
Retailer 2
-
$1,112 SGD
$870 USD
View
A
Retailer 3
-
$1,161 SGD
$908 USD
View
Final sale: no returns
A
Retailer 4
-
$1,425 SGD
$1,115 USD
View
A
Retailer 5
-
$1,478 SGD
$1,156 USD
View
A
Retailer 6
-
$1,638 SGD
€1,220 EUR
View
B+
Retailer 7
-
$3,829 SGD
$2,995 USD
View
B+
Retailer 8
-
$4,038 SGD
£2,487 GBP
View
B
Retailer 9
-
$4,705 SGD
$3,680 USD
View
Most Expensive
B
Do Amore Diamonds
27-543E47EED · Nov 1
$6,635 SGD
$5,190 USD
View
9 more retailers have this diamond
Prices start from $1,097 SGDSave up to $5,538 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
$1,097 SGD