A Geoscience Digital Image Library

DescriptionTilleyite is one of those rare minerals that is both a silicate and a carbonate. It has formula Ca5Si2O7(CO3)2 and is found in contact-metamorphic high-temperature marbles. It is often associated with wollastonite, vesuvianite, garnet and calcite. In this marble from Crestmore, California, it has a greenish color, but it is more typically white.
LocationUSA ▹ California. Near Crestmore.
PhotographerDarla Sondrol. 2001-06-20.
CollectionUniversity of North Dakota Mineralogy Collection #1907.
Key wordstilleyite, California
Tech details528 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number820