The phrase 'precious factor' is correct and usable in written English.
You can use it to refer to something as invaluable, rare, or highly valuable. For example, "Time is a precious factor that should never be wasted."
Eleven Madison Park's chef, Daniel Humm, known to my parents from his San Francisco days, specializes in same, but the restaurant's rather gnomic new menu system, a prix-fixe menu with each course described by a single word, pushed past the precious factor and turned them off.
No is a precious factor on your journey to your most exhilarating dreams.
This special version will be available in two colors, "Jewel Pink" and "Precious White", with some crystals adding to the cute factor.
Also in this phase, excluding very precious artefacts, economic factors let to omit a preliminary diagnostic phase.
There are many studies on the factors affecting precious metal markets.
A body that sweats less loses less precious liquid from its circulatory system, a major factor in fatigue.
Most immediately, precious resources will be spent on synthesizing transcription factors and replicating extra DNA, rather than going directly into growth of the cell.
Add global economic growth to the reality of precious few alternatives to oil (at any price), and factor in the head-room for still higher, nonpunitive oil prices.
The list of factors that have supported the price of precious metals in recent weeks is long.
Another contributing factor was the increase in Europe's supply of precious metals and the resulting inflation in prices.
So when the bottom seemed to fall out of the precious metals market on May 12, did any of these macroeconomic factors change?
