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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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<blockquote data-quote="Debbie K" data-source="post: 653113" data-attributes="member: 10510"><p>Thank you for your detailed response! I do have one piece of rough Andamooka, and the matrix of coarse sandstone does look very similar to this piece. There are some photos on mindat that look very similar, so it's very likely that this may be the source.</p><p></p><p>I think I may give it a go regarding carving the sandstone away. There is a smaller vein on the back that can try to carve to, and I'll see how that goes before I tackle the front. The front side has an area appears to be about 11 cm by 4 cm in a triangular shape, if the vein is where I <em>think</em> it is. The vein on the top edge is nearly 5 mm thick and then seems to get very thin towards the bottom. The problematic part of this carving is, if that is the case, it's really too big for a gemstone and probably more suitable as a display piece. If it's going to be a display piece, it might be better to leave it as a specimen. I just don't know.</p><p></p><p>Thanks again!</p><p></p><p>Re: color, I agree for the most part about it not being diagnostic of any particular location, especially for opal. The only exception I can think of is the Mexican "fire opal". That bright orange to cherry red color is pretty distinctive.</p><p></p><p>Debbie</p></blockquote><p></p>
[QUOTE="Debbie K, post: 653113, member: 10510"] Thank you for your detailed response! I do have one piece of rough Andamooka, and the matrix of coarse sandstone does look very similar to this piece. There are some photos on mindat that look very similar, so it's very likely that this may be the source. I think I may give it a go regarding carving the sandstone away. There is a smaller vein on the back that can try to carve to, and I'll see how that goes before I tackle the front. The front side has an area appears to be about 11 cm by 4 cm in a triangular shape, if the vein is where I [I]think[/I] it is. The vein on the top edge is nearly 5 mm thick and then seems to get very thin towards the bottom. The problematic part of this carving is, if that is the case, it's really too big for a gemstone and probably more suitable as a display piece. If it's going to be a display piece, it might be better to leave it as a specimen. I just don't know. Thanks again! Re: color, I agree for the most part about it not being diagnostic of any particular location, especially for opal. The only exception I can think of is the Mexican "fire opal". That bright orange to cherry red color is pretty distinctive. Debbie [/QUOTE]
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Gemstones, Minerals & Fossils
Gemstones and Minerals
❓Your Mineral Identification Questions answered here
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