Cushion|Lab Grown|IGI

1.78ct D VVS1 Cushion Lab Grown Diamond

VG • D/VVS1 • IGI LG729539880

Certificate IGI LG729539880

Diamond specifications and retailer prices

From $2,133 USD
As of October 31, 2026
Save $777 USD (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,910 USD at Zales · As of October 30, 2026
View at Zales

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 VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG729539880 or 729539880. Listed at 4 retailers as of October 30, 2026, with prices from $2,133 to $2,910, a $777 spread on the same certified stone. Zales lists it at $2,910. 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
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG729539880
Dimensions8.14 × 6.54 × 4.44 mm
L/W Ratio1.24
Top View
8.14 mm6.54 mm1.78 ctD / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729539880
Side View
Table 65.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: $2,133 USD|Low: $2,133 USD|High: $4,080 USD|Avg: $3,148 USD
Retailer 1
Retailer 2
Retailer 3
Zales
September 26, 2026
Retailer 1$2,133 USD
Retailer 3$2,420 USD
Retailer 2$2,910 USD
Zales$2,910 USD

9 data points across 4 retailers

4 retailers$2,133 USD to $2,910 USD

B
Cheapest Retailer
-
$2,133 USD
B
Retailer 2
-
$2,420 USD
View
B
Retailer 3
-
$2,910 USD
View
Most Expensive
B
Zales
526501045 · Oct 30
$2,910 USD
View
3 more retailers have this diamond
Prices start from $2,133 USDSave up to $777 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.

B
1.78ct Cushion
$2,133 USD