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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="Danbob" data-source="post: 419456" data-attributes="member: 9322"><p>G'day,</p><p></p><p>I haven't done a streak test on any of these stones however, I always conduct a very general hardness test on those that I plan to cab, using a quartz point. </p><p></p><p>I could not scratch the first stone on any part of it's surface, however on the second stone I was able to achieve a light scratch on the yellow portions and a very definite scratch on the brown areas. The specific gravity of both finished cabochons is 2.61 if this is of any interest.</p><p></p><p>With regards to the other two pieces - the hollow stone appears to be sedimentary and is very soft. It has a similar appearance to our local mineral concretions yet I have never seen anything of this shape - including any similar fossils. The last stone is definitely metallic but does not attract a magnet. </p><p></p><p>I do understand that it is extremely difficult to correctly identify any mineral based solely on photographs, so happy for any general info regarding these stones.</p><p></p><p>Cheers...</p></blockquote><p></p>
[QUOTE="Danbob, post: 419456, member: 9322"] G'day, I haven't done a streak test on any of these stones however, I always conduct a very general hardness test on those that I plan to cab, using a quartz point. I could not scratch the first stone on any part of it's surface, however on the second stone I was able to achieve a light scratch on the yellow portions and a very definite scratch on the brown areas. The specific gravity of both finished cabochons is 2.61 if this is of any interest. With regards to the other two pieces - the hollow stone appears to be sedimentary and is very soft. It has a similar appearance to our local mineral concretions yet I have never seen anything of this shape - including any similar fossils. The last stone is definitely metallic but does not attract a magnet. I do understand that it is extremely difficult to correctly identify any mineral based solely on photographs, so happy for any general info regarding these stones. Cheers... [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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