Nylon is not an expensive material.
Yes, slate is harder than shale. Slate is a fine-grained, foliated metamorphic rock that has undergone more intense heat and pressure than shale, a fine-grained sedimentary rock. As a result, slate is more durable and resistant to erosion compared to shale.
Silt and clay size sediments form shale.
No, basalt cannot turn into shale. Basalt is an igneous rock formed from the cooling of lava, while shale is a sedimentary rock formed from the compaction of clay or mud. The processes that form these two types of rocks are different, so basalt cannot directly change into shale.
no
is oil cheap or expensive
Its expensive
Expensive, costly, precious, priceless, or valuable. Those are opposites of cheap.
expensive
expensive opulent, expensive, pricy, highbrow,
Nylon is not an expensive material.
Processing, mining, and waste disposal is expensive.
or
Cheap
It isn't "cheap" but it isn't as expensive as oak.
The duration of Life Is Cheap... But Toilet Paper Is Expensive is 1.38 hours.
The answer here would depend on what you consider to be cheap and or expensive and for that matter what products you wish to buy ...