geodil.jpg

A Geoscience Digital Image Library

732.jpg
TitleHydromagnesite with serpentine (genthite, garnierite) and magnesite from near Lancaster, Pennsylvania
DescriptionThis sample contains predominately green Ni-rich serpentine (sometimes referred to as genthite or garnierite), and yellow patches with hydromagnesite needles on magnesite. Hydromagnesite is a hydrated magnesium carbonate hydroxide. Serpentine is a hydrated magnesium silicate. Magnesite is magnesium carbonate. These minerals often form by alteration of mafic-ultramafic igneous rocks. This sample is 9 cm across.
LocationUSA ▹ Pennsylvania. Near Lancaster. Cedar Hill Quarry.
PhotographerDarla Sondrol. 2001-06-13.
CollectionUniversity of North Dakota Mineralogy Collection #727.
Key wordshydromagnesite, genthite, magnesite, serpentine, Pennsylvania, garnierite
Tech details581 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number732