Can anyone identify these for me please?

Steve1236

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Sep 14, 2017
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DDancer

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Mar 25, 2014
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All of the materials except the stone in the bottom left in picture 1 exhibit chalcedony formation and in picture 2 you have a chalcedony formation with a vug of quartz crystals. The stone I excluded shows cubit formation and has me scratching my head as well as the green coloration~ maybe a variation of quartzite and something else. As to the UV results the orange might be due to calcite but the blue and green are common for quartz minerals. There are other minerals present in the chalcedony judging by the colorations but its primarily quartz silicate material. Neat stuff. My thoughts.
 

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