A Geoscience Digital Image Library

TitleHemimorphite from Leadville, Colorado
DescriptionThe white crystals are hemimorphite, which was called calamine before it was found in individual crystals. Hemimorphite is a silicate with formula Zn4Si2O7(OH)2-H2O. Specimens of hemimorphite tend to be of two very different forms. One form produces very glassy, clear or white, thin, bladed crystals, often well formed showing many crystal faces (such the crystals shown here). The other form produces a blue to blue-green botryoidal crust. This sample is approximately 9 cm across.
LocationUSA ▹ Colorado. Near Leadville.
PhotographerShannon Heinle. 2001-05-22.
CollectionUniversity of North Dakota Mineralogy Collection #1252.
Key wordscalamine, hemimorphite
Tech details451 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera.
GeoDIL number558