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Cushion|Lab Grown|IGI

1.78ct D FL Cushion Lab Grown Diamond

GD • D/FL • IGI LG784642240

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

Certificate IGI LG784642240

Diamond specifications and retailer prices

From $805 USD
As of October 29, 2026
Save $4,275 USD (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,080 USD at Yadav Diamonds · As of October 30, 2026
View at Yadav 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 standard cut grade and certified by IGI LG784642240 or 784642240. Listed at 11 retailers as of October 29, 2026, with prices from $805 to $5,080, a $4,275 spread on the same certified stone. Yadav Diamonds lists it at $5,080. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.78
Carat
D
Color
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784642240
Dimensions7.00 × 6.83 × 4.77 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
7.00 mm6.83 mm1.78 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784642240
Side View
Table 66.0%Crown 38.1°Girdle: STK-VTKPavilion 40.1°Culet: NoneDepth 69.8%

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 29
Current: $3,680 USD|Low: $649 USD|High: $6,880 USD|Avg: $3,016 USD|-36.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Yadav Diamonds
October 30, 2026
Retailer 10$805 USD
Retailer 7$808 USD
Retailer 2$908 USD
Retailer 6$1,035 USD
Retailer 11$1,145 USD
Retailer 4$1,195 USD
Retailer 9$2,995 USD
Retailer 5$3,227 USD
Retailer 1$3,680 USD
Retailer 8$4,800 USD
Yadav Diamonds$5,080 USD
Retailer 3$6,173 USD

26 data points across 12 retailers

11 retailers$805 USD to $5,080 USD

A
Cheapest Retailer
-
$805 USD
A
Retailer 2
-
$808 USD
View
A
Retailer 3
-
$908 USD
View
Final sale: no returns
A
Retailer 4
-
$1,035 USD
View
A
Retailer 5
-
$1,145 USD
View
A
Retailer 6
-
$1,195 USD
€1,138 EUR
View
Retailer 7
-
$2,995 USD
View
Price last confirmed 9 days ago
B
Retailer 8
-
$3,227 USD
£2,541 GBP
View
B
Retailer 9
-
$3,680 USD
View
B
Retailer 10
-
$4,800 USD
View
Most Expensive
B
Yadav Diamonds
12865081 · Oct 30
$5,080 USD
View
10 more retailers have this diamond
Prices start from $805 USDSave up to $4,275 USD

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
$805 USD