"You collect very many gems."

Translation: Plurimas gemmas colligitis.

[luaga97]

Sounds like something you would say to Spyro the Dragon and Sparx.

[MarkWaddel2]

Why can't I start the sentence with the Pronoun Tu?

[Moopish]

What verb ending are you using?

You can use tu with colligis since that would be a second person singular form.

If you are using colligitis then you would have to use vos since that is a second person plural form.