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Gemstones, Minerals & Fossils
Gemstones and Minerals
Black Spinel - cutting options and are large ones rare?
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<blockquote data-quote="excalibur63" data-source="post: 132182" data-attributes="member: 2506"><p>Twapster, sure looks like Black Spinel (Black Jack) to me. I've got mountains of <5crt. and a dozen or so of 20-30 crt, but I have been told by a fellow prospector that he has "matchbox" sized Black Jack (although I've yet to see them as yet!!)</p><p></p><p>R2C, Nice large Specimens you have there, but from the photo, it more resembles something from the quartz family.</p><p></p><p>I had a muck around with a bit of Black Jack, and cut it in a SRB this is 3.6crt</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/2506/1423372638_bj1p.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/2506/1423373038_bj2p.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/2506/1423373089_bj3p.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/2506/1423373144_bj4p.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="excalibur63, post: 132182, member: 2506"] Twapster, sure looks like Black Spinel (Black Jack) to me. I've got mountains of <5crt. and a dozen or so of 20-30 crt, but I have been told by a fellow prospector that he has "matchbox" sized Black Jack (although I've yet to see them as yet!!) R2C, Nice large Specimens you have there, but from the photo, it more resembles something from the quartz family. I had a muck around with a bit of Black Jack, and cut it in a SRB this is 3.6crt [img]https://www.prospectingaustralia.com/forum/img/member-images/2506/1423372638_bj1p.jpg[/img] [img]https://www.prospectingaustralia.com/forum/img/member-images/2506/1423373038_bj2p.jpg[/img] [img]https://www.prospectingaustralia.com/forum/img/member-images/2506/1423373089_bj3p.jpg[/img] [img]https://www.prospectingaustralia.com/forum/img/member-images/2506/1423373144_bj4p.jpg[/img] [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
Black Spinel - cutting options and are large ones rare?
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