| Title | Tilleyite |
| Description | Tilleyite 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. |
| Location | USA ▹ California. Near Crestmore. |
| Photographer | Darla Sondrol. 2001-06-20. |
| Collection | University of North Dakota Mineralogy Collection #1907. |
| Key words | tilleyite, California |
| Tech details | 528 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 820 |
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