It's impossible to say how many atoms are in a stone without knowing:

* The type of stone: Different minerals have different densities and atomic compositions.

* The size and weight of the stone: A small pebble will have far fewer atoms than a large boulder.

Here's a simplified example:

Let's say we have a small, smooth stone that weighs 1 gram and is mostly made of quartz (silicon dioxide, SiO2).

1. Find the molar mass: The molar mass of SiO2 is approximately 60.08 g/mol (28.09 g/mol for Si + 2 x 16.00 g/mol for O).

2. Calculate the number of moles: 1 g / 60.08 g/mol = 0.0166 moles.

3. Use Avogadro's number: One mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.). So, our 1-gram stone has approximately 0.0166 mol x 6.022 x 10^23 atoms/mol = 1.00 x 10^22 atoms.

This is just an estimate! The actual number of atoms in the stone could be higher or lower depending on its composition and impurities.