The great icosidodecahedron is one of the uniform polyhedra, which I do not know well. I stumbled across it while creating facetings of the (lesser) icosidodecahedron. This solid has two face-types, there are red pentagrams and yellow equilateral triangles, as seen in the next two pictures.
The dual of this solid is the great rhombic triacontahedron. Its faces are thirty interpenetrating rhombi.
I used Stella 4d to create these images. You may try this program for free at http://www.software3d.com/Stella.php.
RobertLovesPi.net 
Thank you for this one, and all your posts, Robert. Beautiful! I think this is the year for me to learn Stella 4d. Your work has definitely inspired me. Happy New Year to you and yours
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You’re welcome, and happy 2020 to you!
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Fascinating! Happy 2020.
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