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Yogo sapphires were ultimately traced from the alluvium to their source. [31] In February 1896, a sheepherder named Jim Ettien found the sapphire mother lode: the Yogo dike. [21] [61] [62] Ettien was prospecting for gold, and found sapphires after washing gravel he found in a fissure within a limestone outcrop. [44] Ettien staked two claims.
The sapphires, called Yogo sapphires as they are mined near Yogo Creek, occur in a formation three miles (4.8 km) long and eight feet (2.4 m) across. [ 1 ] The mountains are named for a butte in the range, Belt Butte, itself named for a band of white rock which encircles it.
An uncut, rough yellow sapphire found at the Spokane Sapphire Mine near Helena, Montana. Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, it occurs in other colors, including gray and black, and also can be colorless.
The name is a reflection of its natural wealth. Marco Polo wrote that the island had the best sapphires, topazes, amethysts, and other gems in the world. [ 1 ] Ptolemy , the 2nd century astronomer recorded that beryl and sapphire were the mainstay of Sri Lanka’s gem industry.
"Alluvial sapphires are found in the Orient" > Asia? Done. Pumpkin Sky talk 23:34, 3 June 2012 (UTC) "The host rock for the sapphires, the Yogo dike, is a dark gray to green porphyritic lamprophyre consisting of clinopyroxene and phlogopite phenocrysts set in a matrix of clinopyroxene, titanian magnetite, apatite, chlorite, serpentine and calcite.
Sapphires of gem quality are found in the region. They were first found in this region at Rock Creek near Philipsburg in 1892. Rock Creek, also known as Gem Mountain, has been the most productive site in Montana for sapphires by far, even more so than Yogo Gulch, producing over 190 million carats of sapphires [citation needed].
In the 1950s and 60s, WANN Radio in Annapolis became a beacon for Black listeners by playing music and broadcasting voices that other mainstream stations ignored.
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