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Definition of Graystone
1. n. A grayish or greenish compact rock, composed of feldspar and augite, and allied to basalt.
Definition of Graystone
1. Noun. A type of gray, volcanic rock, typically containing feldspar and iron ¹
2. Noun. A building made of any type of gray stone, such as limestone ¹
¹ Source: wiktionary.com