If you like, you can put some of those metal carbonates to good use and start making all kinds of brilliantly colored salts and complexes, if you
think you might be into making that. Oxides, hydroxides, nitrates, chlorides, phosphates(if you can get your hands on some phosphoric acid or a
water-soluble phosphate salt), chromates(if you obtain sodium or potassium chromate/dichromate), silicates. Copper in particular has a lot of
beautiful chemistry that can easily be found all over the site, and several of us(including myself) collect copper compounds or complexes.
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