This region is the only locality of a blue (copper-bearing?) variety of pectolite called "larimar". The material, formed by hydrothermally altered volcanic rocks, was (re)discovered in 1974 and used as gem/ornamental stone.
Ref.:
- N. Jb. Miner., Mh., Jg. 1991, H.1, 14 - 22
- Lapis 21(1), 1996
-
http://www.larimarmuseum.org/larimarinfo.html [Link dead. Jun 2011]
References
Robert Woodruff and Emmanuel Fritsch (1989) Blue pectolite from the Dominican Republic. Gems & Gemology, winter 1989, 216-225.
Mineral List
18 entries listed. 11 valid minerals.
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