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A Geoscience Digital Image Library

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TitleSard
DescriptionSard is a yellow to brown agate. Agate is a cryptocrystalline (crystals too small to be seen even by a microscope) variety of quartz. These varieties are divided more by character than by color. These different variatites are often used as semi-precious gemstones and for decorative purposes.
LocationUSA ▹ Colorado. Bijou Basin.
PhotographerShannon Heinle. 2002-01-24.
CollectionUniversity of North Dakota Mineralogy Collection #1645.
Key wordssard, agate, quartz, cryptocrystalline
Tech details475 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2190