On the Ionicons Cheatsheet, the icons cannot be selected or copied / pasted into design documents. Older versions of this page had a selectable icon. Could this feature be brought back?
Try Font Awesome’s SVG’s: https://fontawesome.com/icons?d=gallery&m=free
See: https://robferguson.org/blog/2018/04/09/theming-your-ionic-3-app-bespoke-svg-icons/
While there are a lot of things to like about FontAwesome, I have found that the SVG magic does not play very nicely with Angular as of FA 5.0.x. Specifically, binding classes to dynamically change icons and using structural directives such as ngIf have not worked for me. Moving structural directives up to surrounding elements has been the only workaround I have consistently got working.