Definition of "felsite" [fel•site]

• A fine-grained, light-colored igneous rock, composed chiefly of feldspar and quartz. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The reason I wanted to see this beach is because the book said that if, conditions were right, the sound of the waves hitting this unique shoreline of flat, shingle-like “pink rhyolite and felsite bedrock” makes a tinkling, bell-like sound."
• "It exists in a felsite dyke immediately on the coast."
• "The lode is a large irregular one of pure arsenical pyrites, existing in a felsite dike near the sea coast."