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Gemstones, Minerals & Fossils
Gemstones and Minerals
What kind of rock is this?
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<blockquote data-quote="SWright" data-source="post: 66761" data-attributes="member: 1541"><p>G'Day</p><p></p><p>Its hard to tell without handling the thing. As a guess I would plum for hematite. It is very slightly magnetic as some higher grade hematite can be but not as much as magnetite. There are lots of hematite bearing rocks around Adelaide but you would have to ask yourself how such a heavy rock got in amongst beach sand - or was it in the rocky parts?. Some types of hematite are shiny and bright (called specular hematite or specularite) and can form what is called a botryoidal texture. This looks like smooth bubbbles on the surface and when you break into the bubbles or see them on their edge they appear like very fine radiating crystals. One photo seemed to have that appearance.</p><p></p><p>Araluen</p></blockquote><p></p>
[QUOTE="SWright, post: 66761, member: 1541"] G'Day Its hard to tell without handling the thing. As a guess I would plum for hematite. It is very slightly magnetic as some higher grade hematite can be but not as much as magnetite. There are lots of hematite bearing rocks around Adelaide but you would have to ask yourself how such a heavy rock got in amongst beach sand - or was it in the rocky parts?. Some types of hematite are shiny and bright (called specular hematite or specularite) and can form what is called a botryoidal texture. This looks like smooth bubbbles on the surface and when you break into the bubbles or see them on their edge they appear like very fine radiating crystals. One photo seemed to have that appearance. Araluen [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
What kind of rock is this?
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