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Let's Rock => Identifications of Materials => Topic started by: axllaird on September 24, 2018, 06:39:11 PM

Title: Found on the beach...
Post by: axllaird on September 24, 2018, 06:39:11 PM
Pink stone with crystal pockets, clear, white(calcite?)and some other colourations. Calcite? seems slightly softer than the pink stone as is worn away a little. I'm hoping for rhodonite or rhodochrosite...any ideas. Found on the east coast of scotland around Tayside.
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Title: Re: Found on the beach...
Post by: southerly on September 24, 2018, 07:32:35 PM
Nice rock, most likely quartzite. Rhodonite is typically associated with black manganese oxides. Plenty of metamorphic rocks around Tayside so both are possible and both are tough enough to withstand beach tumbling. Rhodochrosite is much softer and less likely to survive beach tumbling and less likely a product of metamorphism.
Title: Re: Found on the beach...
Post by: axllaird on September 25, 2018, 03:47:35 AM
Cheers, southerly that shines a light. An interesting area geologically, are you familiar with it, as i've only recently started walking there?
Title: Re: Found on the beach...
Post by: lithicbeads on September 26, 2018, 10:49:52 AM
If I am truely seeing yellow in the image it would be rhodonite altering to spessaretiene garnet (massive ) which is a common alteration in my neck of the woods.
Title: Re: Found on the beach...
Post by: axllaird on October 03, 2018, 09:09:12 AM
Hi lithicbeads sorry for the bad pics, they were taken indoors. I have taken some new ones outside for better light. Hope all is revealed and i can name my rock.
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Title: Re: Found on the beach...
Post by: lithicbeads on October 03, 2018, 04:52:02 PM
Rhodonite with quartz and I suspect quite a bit of quartz .
Title: Re: Found on the beach...
Post by: axllaird on October 04, 2018, 07:19:34 AM
Thank you, rock now named and on display  :occasion14: