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Pronunciation varies by accent · noun
(geology) A natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma..
Use pitchstone when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pitchstone means (geology) A natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pitchstone where its definition matches the intended context.
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