CaratHunter
Plans
Cushion|Lab Grown|IGI

1.78ct I VS1 Cushion Lab Grown Diamond

ID • I/VS1 • IGI LG662406596

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG662406596

Diamond specifications and retailer prices

From $1,200 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: $1,200 USD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
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 I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG662406596 or 662406596. Listed at a single retailer as of October 28, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG662406596
Dimensions7.31 × 6.95 × 4.51 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.31 mm6.95 mm1.78 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG662406596
Side View
Table 61.0%Crown 34.8°Girdle: MED-THKPavilion 39.5°Culet: NoneDepth 64.9%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: $1,200 USD|Low: $404 USD|High: $1,890 USD|Avg: $1,037 USD|-9.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
April 14, 2026
Retailer 4$410 USD
Retailer 13$525 USD
Retailer 2$572 USD
Retailer 7$781 USD
Retailer 9$786 USD
Retailer 8$880 USD
Retailer 11$965 USD
Retailer 12$986 USD
Retailer 5$1,073 USD
Retailer 6$1,180 USD
Brilliant Earth$1,200 USD
Retailer 3$1,231 USD
Retailer 10$1,433 USD

55 data points across 13 retailers

1 retailer

B
Brilliant Earth
14233907A · Oct 28
$1,200 USD
View

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
$1,200 USD