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Gold Prospecting
Hard Rock Gold Prospecting
Yellow sulphur looking mineral prt2
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<blockquote data-quote="user 4386" data-source="post: 540421" data-attributes="member: 4386"><p>It looks like a mineral forming a boxwork after a sulphide mineral that his been oxidised (weathered out). The boxwork usually follows things like cleavage planes in the original sulphide mineral. It can be many things, and can be a mixture. Some of the other (brown) mineral elsewhere in the specimen is limonite but possibly not this one. There are so many yellowish minerals and greenish minerals, and that belt through Eskdale has the most varied sulphide minerals in gold deposits in Victoria. The primary sulphides include galena, sphalerite, chalcopyrite, bismuthinite, stibnite, arsenopyrite, pyrite to name a few - and many of these have oxides that can be yellowish and greenish. Jarosite (iron sulphate) can also occur. Molybdenite can occur outside of the gold lodes. Without any chemistry, or identification of the sulphide mineral that it is after, it is pretty useless trying to identify from a photo.</p></blockquote><p></p>
[QUOTE="user 4386, post: 540421, member: 4386"] It looks like a mineral forming a boxwork after a sulphide mineral that his been oxidised (weathered out). The boxwork usually follows things like cleavage planes in the original sulphide mineral. It can be many things, and can be a mixture. Some of the other (brown) mineral elsewhere in the specimen is limonite but possibly not this one. There are so many yellowish minerals and greenish minerals, and that belt through Eskdale has the most varied sulphide minerals in gold deposits in Victoria. The primary sulphides include galena, sphalerite, chalcopyrite, bismuthinite, stibnite, arsenopyrite, pyrite to name a few - and many of these have oxides that can be yellowish and greenish. Jarosite (iron sulphate) can also occur. Molybdenite can occur outside of the gold lodes. Without any chemistry, or identification of the sulphide mineral that it is after, it is pretty useless trying to identify from a photo. [/QUOTE]
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Gold Prospecting
Hard Rock Gold Prospecting
Yellow sulphur looking mineral prt2
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