You're thinking about native elements. These are minerals that consist of only one element, not chemically bonded to any other element.

Here are some examples:

* Metals: Gold (Au), Silver (Ag), Copper (Cu), Platinum (Pt), Iron (Fe)

* Nonmetals: Carbon (C) as diamond and graphite, Sulfur (S), Selenium (Se)

* Metalloids: Antimony (Sb), Arsenic (As), Bismuth (Bi)

There are many others, but these are some of the most common.