CaratHunter
Plans
Cushion|Lab Grown|IGI

1.40ct F SI1 Cushion Lab Grown Diamond

GD • F/SI1 • IGI LG616425540

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG616425540

Diamond specifications and retailer prices

From $294 USD
£232 GBP
As of October 27, 2026
Save $1,296 USD (82%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,590 USD at Do Amore Diamonds · As of October 27, 2026
View at Do Amore Diamonds

About this 1.4ct lab-grown cushion diamond

This 1.4ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG616425540 or 616425540. Listed at 6 retailers as of October 27, 2026, with prices from $294 to $1,590, a $1,296 spread on the same certified stone. Do Amore Diamonds lists it at $1,590. 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

1.40
Carat
F
Color
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG616425540
Dimensions6.48 × 6.42 × 4.26 mm
L/W Ratio1.01
Girdle conditionFaceted
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
6.48 mm6.42 mm1.40 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG616425540
Side View
Table 61.0%Crown 34.3°Girdle: THN-STKPavilion 39.5°Culet: NoneDepth 66.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $1,590 USD|Low: $140 USD|High: $1,590 USD|Avg: $739 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 27, 2026
Retailer 7$185 USD
Retailer 2$294 USD
Retailer 5$368 USD
Retailer 10$432 USD
Retailer 11$532 USD
Retailer 9$632 USD
Retailer 3$697 USD
Retailer 4$1,058 USD
Retailer 8$1,100 USD
Retailer 6$1,290 USD
Do Amore Diamonds$1,590 USD

34 data points across 11 retailers

6 retailers$294 USD to $1,590 USD

A
Cheapest Retailer
-
$294 USD
£232 GBP
Retailer 2
-
$368 USD
View
Price last confirmed 8 days ago
Retailer 3
-
$1,058 USD
£833 GBP
View
Price last confirmed 8 days ago
Retailer 4
-
$1,100 USD
View
Price last confirmed 7 days ago
Retailer 5
-
$1,290 USD
View
Price last confirmed 7 days ago
Most Expensive
C
Do Amore Diamonds
27-004EB2C6D · Oct 27
$1,590 USD
View
5 more retailers have this diamond
Prices start from $294 USDSave up to $1,296 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
1.40ct Cushion
$294 USD