It is FREE because I am a fan of a popular science and I support sharing knowledge. You can download these files for free, however work hours and other resources cost me while creating it, so I appreciate if you encourage me to create similar products in the future and support me by paying the price you think is fair.
What you get:
.png file, 1920x1920 px (6.4x6.4 in or 16.3x16.3 cm if 300 dpi used)
.png file, 5400x5400 px (18x18 in or 45.7x45.7 cm if 300 dpi used)
Content of the illustration
This picture is popularized and simplified illustration of the alkali and plagioclase feldspar mineral solid solution series. Minerals have greater color variety than shown. Also the mineral abundancy vs T-P conditions are not represented.
Please note that for professional studies another, more comprehensive mineralogy and geochemistry sources should be used.
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