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Gemstones, Minerals & Fossils
Gemstones and Minerals
⭐ Gemstone & Mineral Show n Tell
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<blockquote data-quote="user 4386" data-source="post: 444971" data-attributes="member: 4386"><p>First time I have seen zaratite. Not sure why you think the presence of nickel would make it magnetic (more likely magnetite in the sample). It is iron, not nickel, that causes the magnetism (I think the confusion is that a number of iron minerals (and also iron-rich nickel ores such as those that contain the magnetic iron sulphide, pyrrhotite) also have nickel in them.</p><p></p><p>Do a search on <strong>Series on identifying minerals - part 6 MAGNETISM</strong> under my monicker if you want more details.</p><p></p><p>Another thing - secondary minerals (as zaratite is) are never magnetic. So although limonite is an iron hydroxide, it is non-magnetic, nor is hematite, but the magnetite and maghemite from which they form are.</p><p></p><p>I think I have been to the Lord Brassey years ago, but I cannot remember for the moment exactly where it is (presumably the Zeehan district?).</p></blockquote><p></p>
[QUOTE="user 4386, post: 444971, member: 4386"] First time I have seen zaratite. Not sure why you think the presence of nickel would make it magnetic (more likely magnetite in the sample). It is iron, not nickel, that causes the magnetism (I think the confusion is that a number of iron minerals (and also iron-rich nickel ores such as those that contain the magnetic iron sulphide, pyrrhotite) also have nickel in them. Do a search on [b]Series on identifying minerals - part 6 MAGNETISM[/b] under my monicker if you want more details. Another thing - secondary minerals (as zaratite is) are never magnetic. So although limonite is an iron hydroxide, it is non-magnetic, nor is hematite, but the magnetite and maghemite from which they form are. I think I have been to the Lord Brassey years ago, but I cannot remember for the moment exactly where it is (presumably the Zeehan district?). [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
⭐ Gemstone & Mineral Show n Tell
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