is mixture of Quartz
or Chalcedony material
containing spots or bands of red Cinnabar,
yellow Calomel (mercury chloride) and black Metacinnabar.
The name Myrickite is a lapidary term, not a mineral
name, and is used for both agatized and opalized material
containing Cinnabar. It typically has a white,
pale yellow or light to dark gray background color with
vivid spots or banding of orange to red Cinnabar and
black Metacinnabar. It is reported from one source that
Myrickite was named by D. B. Sterrett in 1912 for Francis Marion "Shady" Myrick,
a prospector and miner, who found the material in 1911
somewhere in the California desert. However, another
account suggests that Myrickite is named for an occurance
of the material from an area about two miles northeast
of Myrick Spring, San Bernardino County, California.
It's possible both the material and the spring are named
after Shady Myrick. The story behind the nickname "Shady"
is that when he was a young prospector, he was persistent
in asking a couple old timers where he might find silver.
One of them casually told him to go dig under a nearby
tree. After digging for a while in the shade of the
tree, to the dismay of the old timers, Myrick actually
found a small silver vein. So the nickname "Shady"
has also been found at other locations in California.
During the early 1950s,
Myrickite was found in small quantities at the Manhattan Mine, Napa County.
Other occurances of Myrickite in California are:
Death Valley, Inyo County; Soledad Mountain, Mojave
District, Kern County; Lead Pipe Springs, San Bernardino
County; Riconada Mine, San Louis Obispo County; and
the Tilton Ranch, Santa Clara County. There are also
occurances at these locations outside of California:
at several locations in the Mazatzal Mountains, Gila
and Maricopa Counties, Arizona; the Yellow Pine District,
Valley County, Idaho; Beatty, Nye County, Nevada; and
Morton District, Lewis County, Washington.