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Gemstones, Minerals & Fossils
Gemstones and Minerals
Is this rock apatite? Found in Northern NSW
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<blockquote data-quote="user 4386" data-source="post: 634235" data-attributes="member: 4386"><p>Can you easily scratch it with an iron nail? Perhaps just scratch it with ordinary window glass? Quartz would scratch deep grooves in it easily if apatite.</p><p></p><p>It looks like it is a fragment embedded in a sedimentary rock - since it is still angular I would not expect that for apatite (soft minerals soon become rounded in streams etc. Cleavage is commonly very indistinct (planar faces) although actual planar crystal faces are quite common (but would not survive transport in water).</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/4386/1644183076_mohs-hardness-scale.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Despite its commonly green colour, its streak is white.</p><p></p><p>It can help to give something like an accurate location, if it is from a named historical mine.</p><p></p><p>Actually it might not be in a sedimentary rock - is it in a quartz vein?</p></blockquote><p></p>
[QUOTE="user 4386, post: 634235, member: 4386"] Can you easily scratch it with an iron nail? Perhaps just scratch it with ordinary window glass? Quartz would scratch deep grooves in it easily if apatite. It looks like it is a fragment embedded in a sedimentary rock - since it is still angular I would not expect that for apatite (soft minerals soon become rounded in streams etc. Cleavage is commonly very indistinct (planar faces) although actual planar crystal faces are quite common (but would not survive transport in water). [img]https://www.prospectingaustralia.com/forum/img/member-images/4386/1644183076_mohs-hardness-scale.jpg[/img] Despite its commonly green colour, its streak is white. It can help to give something like an accurate location, if it is from a named historical mine. Actually it might not be in a sedimentary rock - is it in a quartz vein? [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Is this rock apatite? Found in Northern NSW
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