Neither. Nickel is a metal- just like iron or copper.
Gem's. Gem's could also be 'gem is' so you have to note the context of the word to tell if it is possessive or 'is' eg The gem's green -- gem's = gem is The gem's colour is green. -- gem's = possessive
october gem is a gifted gem from the undead
Diamonds and facet grade peridot have both been found in meteorites. Nickel-iron meteorites are also now being fashioned into jewelry items.
gem is son gem is sen gem is send-d gem i son
there is no gem
gem of wisdom
the "gem".
If you mean gem as in a great thing, then Youkon's known gem in potatoes. The mineral gem, however, is gold.
Brown is the most common colour of gem-quality diamond found. The colour is caused by the inclusion of nickel in its composition, or from irradiation. Plastic deformation is another potential cause for this colour.
Aquarius gem is Amethyst.
the poo gem