Plagioclase Feldspars

[@itsAfishingMetaphor]

I liked the video! Very interesting. I always thought quartzites were the more plentiful between the two for some reason. Im looking forward to keep learning more! Thanks!

[@morakamalebati7698]

Thank you so much!

[@morakamalebati7698]

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[@geoffgeoff143]

Why does some Labrorite form clear crystals?

[@morakamalebati7698]

The main reason why not all labradorites exhibit labradorescence (i.e., some are clear) is because of lamellar separation and composition. The requirement for lamellar separation is a very slow cooling of the rock containing the plagioclase. This slow cooling will enable Ca, Na, Si, and Al ions to diffuse through the plagioclase and produce the lamellar separation. The lamellar separation only occurs in plagioclases of a certain composition; those of calcic labradorite (50-70% anorthite and bytownite with an anorthite content of approximately 70-90%. Therefore, not all labradorites exhibit labradorescence (they might not have the correct composition and or/ they cooled too quickly), and not all plagioclases that exhibit labradorescence are labradorites (they may be bytownite).

[@ninentek5142]

why do i hear music in the background? Damn. Fail.

[@morakamalebati7698]

Will improve. Thank you for your input

[@Bloodknok]

AI commentary is grating and distracts

[@morakamalebati7698]

Thank you for your input, highly appreciated 🙏🏼

[@4integrity]

Too difficult to listen to.

[@morakamalebati7698]

Ask I’ll be happy to help