No, a verb is where explaining that something's doing something. For Example, "I'm walking to the shop."
It is purer.
comparative : purer superlative : purest
purer
White sugar.
purer, purest
purer and purest
Make Germany an purer , free country.
Crystals generally grow.bigger and purer because of the lack of gravity.
purer and with lower conductivity due to reduced ionic content
That is the correct spelling for the adjective "whiter" (of a purer white, brighter).
It's impossible to say, as color is an attribute of individual stones. Though generally rubies are thought of as being of a purer color, some garnets may be of a purer red than some rubies and vice-versa.
Silver. The purer the silver the more rapidly it will tarnish.