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Blue John. Polished slice of Blue John from Derbyshire, England
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Blue John. Polished slice of Blue John from Derbyshire, England
Polished slice of Blue John from Derbyshire, England. The mineral is so far unique to one location in the Derbyshire Peak District, England. It is a banded white and purple variety of fluorite (calcium fluoride)
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Media ID 8581235
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10710161
Black Background Derbyshire Fluorite Fluorspar Halide Halide Mineral Mineral Polished Precious Purple Semi Specimen United Kingdom
EDITORS COMMENTS
Blue John: A Rare and Majestic Treasure from the Derbyshire Peak District, England Blue John, a unique and captivating mineral specimen hailing from the heart of the Derbyshire Peak District in England, is showcased in this stunning polished slice. This rare and precious mineral, with its distinctive banding of white and deep purple hues, is a testament to the natural beauty and geological wonders of the United Kingdom. Blue John, a variety of fluorite (calcium fluoride), is a halide mineral that has captured the imagination of collectors and scientists alike for centuries. Its name is derived from the Old English term 'blaew' meaning 'blue' and 'johan' meaning 'God's gift.' This moniker reflects the mineral's rarity and the awe it inspires. The mineral's unique coloration is due to the presence of tiny impurities of manganese and other elements within the crystal structure. The bands of color are not uniform, but rather vary in width and intensity, creating a mesmerizing and intricate pattern. Blue John is so far unique to this one location in the Derbyshire Peak District, making it a truly precious and sought-after mineral. Its discovery dates back to the 18th century, and since then, it has been mined and admired for its beauty and rarity. This polished slice of Blue John, with its long and elegant form, is a testament to the skill and artistry of the miner and the lapidary. It is a reminder of the natural wonders that can be found in the most unexpected places and the importance of preserving and appreciating the beauty of the natural world.
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