Final answer:
Silicon (Si) is the primary element found in glass and many minerals, while Fluorine (F) is present in minerals such as fluorite and is used in specialized glass production.
Step-by-step explanation:
The element found in glass and many minerals that is also listed among the options provided is Silicon (Si). Silicon dioxide, SiO₂, commonly known as silica, is one of the most important compounds used to make glass. It is also a major constituent of sand and occurs in various crystalline forms as quartz. As for other elements mentioned, Fluorine (F) is involved in minerals like fluorite (calcium fluoride), which is used in making certain types of glass, but Silicon (Si) is the key component when it comes to the majority of glass and mineral structures.
Fluorine in Minerals
While Silicon (Si) is the primary element when considering glass and many minerals, it's worth noting that Fluorine is also found in combination with cations in several minerals, like the mineral fluorite (calcium fluoride), found extensively in places like Illinois. This mineral plays a role in some specialized types of glass production. Fluorine is also known for its high reactivity and is not found free in nature; it is always in combination with other elements.