There's a few minerals that exhibit something called piezoelectricity and pyroelectricity, which mean that either heat or pressure can turn them electric. Here's a demo from the SciShow Rocks Box where you can see this for yourself - all you need is some tourmaline!
Get a monthly hand-picked rock, mineral, gem, or fossil with the SciShow Rocks Box!
https://SciShow.Rocks/
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Sources:
https://aps.org/publications/apsnews/201403/physicshistory.cfm
https://books.google.com/books?hl=en&lr=&id=QJipDQAAQBAJ&oi=fnd&pg=PP1&dq=piezoelectric&ots=FNdvjDoth8&sig=pYA1TWsVxFgHEEsjvzFYEOHy9og#v=onepage&q=piezoelectric&f=false
https://dictionary.iucr.org/Piezoelectricity),
https://geology.com/minerals/tourmaline.shtml
https://geologyscience.com/minerals/tourmaline/?amp#Formation_of_Tourmaline
https://repository.lsu.edu/cgi/viewcontent.cgi?article=1702&context=geo_pubs
https://www.americanpiezo.com/blog/top-uses-of-piezoelectricity-in-everyday-applications/
https://www.aps.org/publications/apsnews/201403/physicshistory.cfm
https://www.autodesk.com/products/fusion-360/blog/piezoelectricity/
https://www.researchgate.net/figure/Crystal-structure-of-tourmaline-Crystal-space-group-R3m-Cell-a-159604-A-c_fig2_255758743
https://www.researchgate.net/figure/Schematic-representation-of-tourmalines-crystal-structure-viewed-normal-A-and-parallel_fig1_281175733
https://www.researchgate.net/publication/233692913_A_2400_year_history_of_pyroelectricity_from_Ancient_Greece_to_exploration_of_the_solar_system
https://www.researchgate.net/publication/327024178_A_Review_on_Low-Grade_Thermal_Energy_Harvesting_Materials_Methods_and_Devices#pf15
https://www.sciencedirect.com/science/article/abs/pii/S092583881830495X#preview-section-cited-by
https://www.sciencedirect.com/science/article/pii/S092583881830495X
https://www.sciencedirect.com/topics/materials-science/piezoelectric-material
Images:
https://www.gettyimages.com/detail/video/macro-shot-of-automatic-pick-and-place-machine-quickly-stock-footage/1371462742?adppopup=true
https://www.gettyimages.com/detail/photo/natural-gemstone-green-tourmaline-on-white-royalty-free-image/1311662610?phrase=tourmaline&adppopup=true
https://commons.wikimedia.org/wiki/File:Tourmaline_25.jpg
https://www.gettyimages.com/detail/photo/colorful-tourmaline-gemstones-on-white-background-royalty-free-image/1169792936?phrase=tourmaline&adppopup=true
https://www.gettyimages.com/detail/photo/water-melon-tourmaline-royalty-free-image/157594804?phrase=tourmaline&adppopup=true
https://www.gettyimages.com/detail/photo/black-tourmaline-set-royalty-free-image/518833992?phrase=tourmaline&searchscope=image%2Cfilm&adppopup=true
https://www.gettyimages.com/detail/photo/macro-mineral-chrome-dravite-tourmaline-on-a-white-royalty-free-image/1094692638?phrase=tourmaline+dark+green&searchscope=image%2Cfilm&adppopup=true
https://www.gettyimages.com/detail/photo/tourmaline-bracelet-royalty-free-image/1484157611?phrase=colorful+tourmaline&searchscope=image%2Cfilm&adppopup=true
https://commons.wikimedia.org/wiki/File:Teofrasto_Orto_botanico_PA.jpg
https://commons.wikimedia.org/wiki/File:Carl_von_Linn%C3%A9.png
https://commons.wikimedia.org/wiki/File:Curie,_Jacques_und_Pierre_mit_Eltern.jpg
https://www.gettyimages.com/detail/video/gold-quartz-crystal-pocket-watch-lying-on-dark-green-stock-footage/1465506549?adppopup=true
https://www.gettyimages.com/detail/photo/gas-lighter-gun-for-gas-stove-isolated-on-white-royalty-free-image/605980720?adppopup=true
https://www.mdpi.com/2073-4352/13/10/1461
https://commons.wikimedia.org/wiki/File:Inside_QuartzCrystal-Tuningfork.jpg
https://commons.wikimedia.org/wiki/File:SchemaPiezo.gif