Ahh, the magnificent Bridge theme for WordPress.
Unfortunately, when trying to add icons via Visual Composer to page blocks, you only have a text reference to the icons and you can use your imagination only to guess how the icons will look like. Bridge theme authors, take note.
Here is the complete list of icons used in the Bridge multipurpose theme for WordPress.
These icons are provided from date 10.11.2015 (please go to link at the end of this article for complete list of icons).