Mineralogische Kring Antwerpen:

http://www.minerant.org/MKA

Stapel van Stenen:

http://www.stapelvanstenen.nl/

Museums with geological collections:

http://www.geologischmuseum.nl/

http://www.deoudeaarde.nl/

https://www.twentsewelle.nl/

Fluorescense / minerals:

https://www.westerwolde.rocks/

http://www.naturesrainbows.com

http://www.minershop.com

http://uvminerals.org/fms/about-fluorescent-mineral-society

http://www.polmanminerals.com/

Light sources:

http://www.lichtbronnen.be/

http://www.uvsystems.com