Rock

MFA Acc. #: 2000.1302

Description

A natural-occurring, solid mixture of minerals. Rock is characterized by its formation type as either:

- sedimentary: sandstone, shale, limestone, gypsum

- igneous: granite, diorite, basalt

- metamorphic: gneiss, mica, quartzite, marble, slate

Synonyms and Related Terms

stone; rocha (Port.)

Sources Checked for Data in Record

• Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)

• Walter C. McCrone, John Gustave Delly, The Particle Atlas, W. McCrone Associates, Chicago, IV, 1972

• Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

• The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998