Geological Terms Beginning With "J"
For Terms Beginning With Other Letters Please Click Below
A translucent gemstone consisting of either jadeite or nephrite that is typically green in color. Jade is a very durable stone and is used for a variety of jewelry and ornamental objects. Typically cut in the cabochon shape or carved.
A high pressure clinopyroxene that is frequently carved and polished as a gemstone.
A variety of colored chert, typically red or green and often found in association with iron ores. Jasper is frequently used as a gemstone or in the production of ornaments.
A variety of coal that is frequently cut and polished for jewelry or ornaments.
A human made structure built at right angles to a coastline
and extending into the water. Jetties are built to protect an area
of shoreline from the effects of currents, erosion or deposition.
A fracture in rock along which there has been no displacement.
A group of joints that are parallel or nearly parallel. They
are frequently formed at the same time interval from a common process.
A spring balance used in the determination of specific gravity.
Water that is new to the hydrologic cycle. Brought to Earth's surface through volcanic eruptions.
Find it on Geology.com
More from Geology.com
|Minerals: Information about ore minerals, gem materials and rock-forming minerals.|