I want to make the G5 Pegasus Crystal for real. How should I paint it?

[Toastypk 920]

There is a youtube video with someone showing models of the Pegasus Crystal, Unicorn Crystal, and Earth pony Crystal, and once my library re-opens from a long remodelling, they are going to have their 3d printing room back open, and I intend to print the model of the Pegasus Crystal and paint it with something really fancy to make it look just like the actual thing.

Thing is, what should I do?

I looked around at Michaels and I found some fancy glittery paint that could do the trick, but there might be something that will work even better to make that crystal looking effect, some sort of iridescence or shiny look to it. What would be the best steps for this?

And how big would you estimate it is, too? I don't know if the 3d models have a default size in inches, but I'm estimating it's something like 7 or so inches tall.

Edited October 14, 2021 by Toastypk