One family left, and it's the simplest of all.

The definition: a native element is one where the element is already pure — not joined to any partner at all. Sometimes nature just leaves the metal in finished form.

• Native gold, silver, and copper — found as the actual metal. (Native copper mining is mostly historical now; most copper today comes from sulfides.)
• Graphite and diamond — both are pure carbon, yet one is soft and slippery and the other is the hardest gem on Earth.

That diamond-and-graphite pair teaches a deep lesson: same chemistry, but a different atomic structure (how the atoms are stacked) gives a completely different material. Graphite's slippery sheets make it the key material in battery anodes — which is why this humble pencil material is now a critical mineral.

Processing is the easiest of any family: it's already metal, so you recover it physically — gravity, panning, hand-sorting.

Putting the whole board together

You now know every family. Here's the master map — read it as "partner/origin → family → how you process it":

• Joined to sulfur → sulfide → float, then smelt
• Joined to arsenic → arsenide → roast carefully (toxic fumes)
• Joined to oxygen → oxide → furnace or leach
• Weathered at the surface → laterite → easy to dig, leach to refine
• Gravity-sorted by water → sands/placer → separate by weight, magnet, charge
• Joined to carbonate → carbonate → rare earths, heavy processing
• Silicon-oxygen rock → silicate → lithium, roast and acid
• Left by evaporation → evaporite → dissolve and evaporate
• Already pure → native → just recover it physically