MaterialIcon

A Google Material Icon, which includes over 2500+ options.

For example, to display a checkbox icon with customized weight and grade, write the following:

{
  "name": "check_box",
  "fill": true,
  "weight": 300,
  "grade": -25
}

Available for Google Chat apps and unavailable for Google Workspace add-ons.

JSON representation 
{
  "name": string,
  "fill": boolean,
  "weight": integer,
  "grade": integer
}
Fields
name

string

The icon name defined in the Google Material Icon, for example, check_box. Any invalid names are abandoned and replaced with empty string and results in the icon failing to render.
fill

boolean

Whether the icon renders as filled. Default value is false.

To preview different icon settings, go to Google Font Icons and adjust the settings under Customize.
weight

integer

The stroke weight of the icon. Choose from {100, 200, 300, 400, 500, 600, 700}. If absent, default value is 400. If any other value is specified, the default value is used.

To preview different icon settings, go to Google Font Icons and adjust the settings under Customize.
grade

integer

Weight and grade affect a symbol’s thickness. Adjustments to grade are more granular than adjustments to weight and have a small impact on the size of the symbol. Choose from {-25, 0, 200}. If absent, default value is 0. If any other value is specified, the default value is used.

To preview different icon settings, go to Google Font Icons and adjust the settings under Customize.