how to add icon to libra draw

Dear all,

i am using visio 2016 to draw process flowchart and i have create some special icon for process chart by using visio. However, i would like to invite my teammate to create and edit those process chart by using libreoffice. i would like to know if it is possible to output those icon from visio and then transfer it to libreoffice.

Yours Truly,
Samuel Liu