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Cushion|Lab Grown|IGI

1.78ct I VS1 Cushion Lab Grown Diamond

EX • I/VS1 • IGI LG12351907

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG12351907

Diamond specifications and retailer prices

From $622 USD
As of October 30, 2026
Save $1,928 USD (76%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $2,550 USD at Do Amore Diamonds · As of October 29, 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 I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG12351907 or 12351907. Listed at 5 retailers as of October 29, 2026, with prices from $622 to $2,550, a $1,928 spread on the same certified stone. Do Amore Diamonds lists it at $2,550. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.78
Carat
I
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12351907
Dimensions7.99 × 6.61 × 4.45 mm
L/W Ratio1.21
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment. Type IIa
Top View
7.99 mm6.61 mm1.78 ctI / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12351907
Side View
Table 63.0%Crown 37°Girdle: THN-UNDPavilion 39.1°Culet: NoneDepth 67.3%

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 30
Current: $2,550 USD|Low: $535 USD|High: $2,730 USD|Avg: $1,378 USD|-6.6%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 28, 2026
Retailer 4$622 USD
Retailer 2$625 USD
Retailer 5$651 USD
Retailer 3$1,690 USD
Do Amore Diamonds$2,550 USD

24 data points across 5 retailers

5 retailers$622 USD to $2,550 USD

A
Cheapest Retailer
-
$622 USD
A
Retailer 2
-
$625 USD
View
A
Retailer 3
-
$651 USD
View
B
Retailer 4
-
$1,690 USD
£1,331 GBP
View
Most Expensive
B
Do Amore Diamonds
7-1428655 · Oct 29
$2,550 USD
View
4 more retailers have this diamond
Prices start from $622 USDSave up to $1,928 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
$622 USD