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Gold Prospecting
Metal Detecting for Gold
Pyrites specimen?
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<blockquote data-quote="Goldpick" data-source="post: 37849" data-attributes="member: 1695"><p>Sulphuric acid might not be ideal, as Pyrite is iron sulphide, and decomposes into sulphuric acid when leached with water. Hydrogen sulphide gas will also be another undesirable byproduct from adding acid. </p><p></p><p>One of the main reasons why the old timers only took gold from oxidised material in the old mines, is that the sulphides had broken down and oxidised ovef time, leaving free gold in the ore. They could not extract gold from complex sulphides found in the fresh rock/veining at depth.</p><p></p><p> I'd just keep is as a nice specimen, but be aware that pyrite will eventually oxidise over time when exposed to the air. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Goldpick, post: 37849, member: 1695"] Sulphuric acid might not be ideal, as Pyrite is iron sulphide, and decomposes into sulphuric acid when leached with water. Hydrogen sulphide gas will also be another undesirable byproduct from adding acid. One of the main reasons why the old timers only took gold from oxidised material in the old mines, is that the sulphides had broken down and oxidised ovef time, leaving free gold in the ore. They could not extract gold from complex sulphides found in the fresh rock/veining at depth. I'd just keep is as a nice specimen, but be aware that pyrite will eventually oxidise over time when exposed to the air. :) [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
Pyrites specimen?
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