{"id":11027,"date":"2026-08-09T14:13:03","date_gmt":"2026-08-09T14:13:03","guid":{"rendered":"https:\/\/www.pmstudios.co.uk\/blog\/?p=11027"},"modified":"2026-08-09T14:13:04","modified_gmt":"2026-08-09T14:13:04","slug":"uv-fluorescence-on-two-geodes","status":"publish","type":"post","link":"https:\/\/www.pmstudios.co.uk\/blog\/?p=11027","title":{"rendered":"UV fluorescence on two geodes"},"content":{"rendered":"\n

I like to try Ultra Violet (UV) fluorescence on different subjects. Here I an showing how two geodes react differently to UV light. I am showing these using a comparison slider so the difference between ‘daylight’ and UV light can be seen. Drag the slider to show\/hide the images.<\/p>\n\n\n\n

First as a ‘normal’ geode with the daylight on the left and the UV fluorescence on the right:

<\/p>\n\n\n\n
\"\"
Purple geode in daylight<\/figcaption><\/figure>\n\n\n\n
\"\"
Purple Geode in UV light<\/figcaption><\/figure>\n\n\n\n

<\/div><\/p>\n\n\n\n

This a composite image from the above 2 photos:<\/p>\n\n\n\n

\"\"
Composite image from the above 2 photos<\/figcaption><\/figure>\n\n\n\n

This didn’t react very well to UV, it just showed a dark blue colour. But this next one really surprised me:

<\/p>\n\n\n\n
\"\"
A white geode in daylight on a black background<\/figcaption><\/figure>\n\n\n\n
\"\"
The same white geode under UV fluorescence<\/figcaption><\/figure>\n\n\n\n

<\/div><\/p>\n\n\n\n

And this is the composite version of the 2 photos:<\/p>\n\n\n\n

\"\"
Composite image from the above 2 photos<\/figcaption><\/figure>\n\n\n\n

I have never seen white UV fluorescence before. Nature can be quite surprising…<\/p>\n","protected":false},"excerpt":{"rendered":"

I like to try Ultra Violet (UV) fluorescence on different subjects. Here I an showing how two geodes react differently to UV light. I am showing these using a comparison slider so the difference between ‘daylight’ and UV light can be seen. Drag the slider to show\/hide the images. First as a ‘normal’ geode with … Continue reading “UV fluorescence on two geodes”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103,141,154,129,3,143,131,128],"tags":[],"class_list":["post-11027","post","type-post","status-publish","format-standard","hentry","category-before-after","category-comparison-slider","category-effects","category-fluorescence","category-photography","category-rocks-stones","category-tests-and-trials","category-ultra-violet"],"_links":{"self":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/11027","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11027"}],"version-history":[{"count":3,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/11027\/revisions"}],"predecessor-version":[{"id":11071,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/11027\/revisions\/11071"}],"wp:attachment":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11027"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11027"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}