A Geoscience Digital Image Library

TitleGraphite in a marble
DescriptionThis is a specimen (9 cm across) of a graphite-rich marble. The graphite is scattered throughout and appears as silvery gray flakes. Besides graphite, this sample also contains white calcite and brown phlogopite. Most marbles contain more calcite (or dolomite) and less dark colored minerals than this specimen. Graphite is rather common, but generally only as small crystals making up minor parts of a rock. Where graphite is mined, it generally comes from massive veins. Graphite has the same chemical composition as diamond, but the two have radically different properties.
LocationCanada ▹ Ontario
PhotographerDarla Sondrol. 2001-06-27.
CollectionUniversity of North Dakota Mineralogy Collection #60.
Key wordsgraphite, Ontario, Canada
Tech details835 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number916