A Geoscience Digital Image Library

DescriptionGraphite is most commonly a minor disseminated mineral in metamorphic rocks. Massive samples like this one (9 cm across) come from vein deposits. Graphite is pure carbon and is a polymorph of diamond. The two share the same chemistry but have very different structures and very different properties. Graphite can be used for the lead in pencils, as a toughener of steel, and as a lubricant.
LocationSri Lanka. Columbo Mine.
PhotographerDarla Sondrol. 2001-06-27.
CollectionUniversity of North Dakota Mineralogy Collection #49.
Key wordsgraphite, carbon, Sri Lanka
Tech details627 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number913