naturally occurring.
No. By definition a mineral is naturally occurring.
No. Lithium is a naturally occurring element.
No, it is a naturally occurring petrochemical.
Zircon is a naturally occurring mineral and gemstone.
Not all the elements occur naturally; some elements are man-made.
Both. Zinc can be found in nature and also can be manmade.
No, as it occurs in naturally occurring elements of the periodic table.
Tungsten.
Pumice is a naturally occurring volcanic rock.
Robert Mushet invented tungsten steel in 1868. No one invented Tungsten it is a naturally occurring element with the atomic number of 74. It was discovered in 1783 by the Portuguese brothers Jose and Fausto Elhuyar
In the attached list manmade elements are: technetium, promethium and the elements with atomic number between 94 and 118.
It is an isotope that occurs in nature, and is not manmade. Isotopes, by the way, are atoms that have the same number of protons, but different number of neutrons. The atomic number is the same, but atomic weight (or mass) is different. For instance, Carbon can be Carbon 10, 11, 12, or 14. They are all carbon.