What kind of rock is harder?

yes a brick is harder than a rock

Am existing rock can be made harder by recrystallization or additional cementation.

That depends on WHAT rock or mineral we're talking about. Often, rocks are harder, though.

It really depends on what kind of sedimentary or igneous. Granite and Pumice are both igneous and are two completely different rocks.

Sedimentary rock would be harder to sculpt because it is made from many different layers. A metamorphic rock is one rock so it is easier.

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Intrusive rocks are under pressure so they are usually harder.

Yes and no. Rock can be pretty soft.

Coal is considered to be a rock.

The harder rock is diamond

what kind of rock is the oldest rock

Pedestal rocks are usually formed in desert, when wind erosion wears away softer rock under-laying a harder rock. The harder rock is eroded at a slower rate than the softer rock.

The rocks are underground so intrusive rocks are under pressure so its harder.

Some minerals may be harder than steels.

What kind of question is this? Please try harder. What kind of question is this? Please try harder.

It is a sedimentary rock, but the harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. It is composed primarily of carbon along with assorted other elements, including sulfur.

Harder..One of the hardest things in the natural world.

What is it called when softer rock weathers away and leaves harder rocks behind

the harder the rock the longer it takes to abrade

Usually igneous rocks are harder than sedimentary rocks, but not always.

I am very sure that granite is much stronger and harder than sandstone.

No of course not! Its harder than a rock.

The harder a substance is, the longer it takes for it to erode.

The hardness of a rock is determined by scratching it with a harder material.

Impossible to say, not knowing the definition of plain regular rock. There are some rocks harder than obsidian, while many are softer.