A Geoscience Digital Image Library

TitleAndalusite (chiastolite), Lancaster, Massachusetts
DescriptionAndalusite has composition Al2SiO5, the same as kyanite and sillimanite. The varietal name “chiastolite” is used for andalusite that shows the “Maltese cross” pattern seen here. Most of the dark material in this photo is fine grained mica and quartz. This sample is from Lancaster, Massachusetts. The field of view is about 8 cm across.
LocationUSA ▹ Massachusetts ▹ Worcester. Near Lancaster.
PhotographerShannon Heinle. 2001-04-24.
CollectionUniversity of North Dakota Mineralogy Collection #1204.
Key wordschiastolite, andalusite, Massachusetts
Tech details634 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number388