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Hi

In the text that I read the author sometimes uses the word stone and sometimes "rocks". I'm not sure if he means the same by using these two words. I looked up in a dictionary and it said that in US, Can and Austr. rock = stone. The book was written by an American writer.

Here's the excerpt:

In these spells, use your powers of visualization and concentration to direct the energy through the stones. Here, the rocks are usually focal points or tools that add little power of their own. Some of them are amulets and talismans of a kind. The stone pile, detailed below under "Cairn of Power," collects energies from the earth, but the rocks themselves aren't necessarily powerful.

So, do you think that here "rocks" and "stones" are one and the same thing?

Thank you
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The author is trying to avoid using the same word all the time, so is alternating between rock and stone. They mean the same in this context.
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Thank you Feebs!
Hi

How about this sentence:

Check the phone book for local suppliers of rocks and gemstones.

Do the "rocks" mean just ordinary stones (like the ones we can find in our backyard) and gemstones-those more precious ones???
It gets very confusing!
Gemstones usually are regarded as semi-precious: amethyst, garnet, peridot, lapis lazuli, turquoise and so on, often used in fine jewellery.
In the context, rocks can be regarded as those minerals which are not semi-precious, often containing crystalline interiors: agates, geodes, amazonite, quartzes and so on.
Students: We have free audio pronunciation exercises.
Hmm, so I'm not sure how to call "rocks" in this context. Maybe "rocks" are "minerals" and gemstones are "precious stones" That's how I understand it.

thanks Feebs!