Adrian Posted September 7, 2018 Share Posted September 7, 2018 The Isle of Wifght, southern England is famous for it's varieties of sand in various colours, particularly from Alum Bay. It's long been a tradition to make sand pictures and sculptures from the various coloured sands. Some can be found that are over 100 years old.I have a small bottle, just 5cm tall, with a sand "picture" inside. By chance I passed my UV torch over it, and found it to fluoresce brightly. Presumably this is due to the minerals which colour the sand?Technical details:UVF: Nikon D800, 105mm micro-Nikkor lens. UVF stimulated with Convoy S2+ UV LED torch. 20 seconds at f/16, light painted. Link to comment
Andy Perrin Posted September 7, 2018 Share Posted September 7, 2018 Oooh. That’s really pretty. What makes the sand blue? Copper? Link to comment
Adrian Posted September 7, 2018 Author Share Posted September 7, 2018 I don't know, but can only imagine it is something like that! Link to comment
OlDoinyo Posted September 7, 2018 Share Posted September 7, 2018 There are fluorescent minerals to be sure, but I suspect that some of the sand in that bottle has been colored artificially with organic dyes--I have seen the like before. Link to comment
Andy Perrin Posted September 7, 2018 Share Posted September 7, 2018 There are fluorescent minerals to be sure, but I suspect that some of the sand in that bottle has been colored artificially with organic dyes--I have seen the like before.Hah! You caught them! Link to comment
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