"crude materials" is correct and usable in written English.
You can use it to refer to raw materials that need to be processed before being used. For example: "The factory needs to source more crude materials if they are to meet their production goals."
The prices that businesses pay for crude materials have fallen for six consecutive months, and, in October, dropped 9.1percentt.
The artist has hit upon a winning formula, for the crude materials nicely suggest urbanity and the raw, explosive energy of the music.
The major imports are machinery, mineral fuels, manufactured goods, and such crude materials as textile fibres and metal ores and scrap.
For decades, weapons buffs have quietly taught themselves ancient hunting techniques by making atlatls, bows, slings and spears out of crude materials.
The press was nothing remarkable, and the crude materials and nascent talents of its operators are reflected in the blurred type and typographical inconsistencies in its surviving books, of which the Bay Psalm Book is no exception.
Recent intelligence reports have hinted that an attack might involve relatively crude materials in an uncomplicated operation, the officials said, suggesting the possibility of a car or truck bomb rather than a plot relying on sophisticated weapons or training like the commercial aviation studies undertaken by the hijackers in the Sept. 11, 2001, attacks.
Lipid production by oleaginous microorganisms is a promising route to produce crude oil material for the production of biodiesel.
After this observation he developed an immunization procedure based on the use of crude material from the cowpox lesions.
Apart from the very crude material, he delights in wading into the seated area, even climbing up on tables, to force women to admit they fancy their friends, mock the sexual practices of families with their children or call one woman a hooker beside her husband, who clearly doesn't take it well.
The solution was concentrated and the crude material was purified by recrystallization.
Cooling the solution gave 2 g of crude material as off-white crystals (17%).
