Natural stone
Marble
The classic luxury stone, with soft, flowing veins. Best for bathrooms, tables, walls and feature pieces.
About MarbleNatural stone
Hard, heat tolerant natural stone that household acids don't mark. The all-rounder for kitchens, braais and busy counters.
Granite is an igneous rock, formed from cooled magma deep underground. It's made mostly of quartz, feldspar and mica, which is what gives it the crystals and speckles you see in the surface.
Those minerals are what make granite so practical. It's very hard, it handles heat well, and acids like lemon juice, vinegar and wine don't etch it the way they etch marble. Every slab is different, from even speckles to bold, flowing patterns.

Questions
Yes, most granite should be sealed to slow down staining, and resealed from time to time. A quick test: drip a little water on the surface. If it darkens the stone instead of beading, it's time to reseal.
Granite handles heat well. Even so, very sudden heat can stress any stone, especially near edges and joins, so a trivet is a good habit.
Natural stone
The classic luxury stone, with soft, flowing veins. Best for bathrooms, tables, walls and feature pieces.
About MarbleQuartz surface
A quartz surface with even colour and pattern. Non-porous, so it doesn't need sealing. For indoor use.
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