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In this episode, I talk about the rock type granite – why I love it, how it forms and what minerals it contains.
This is a piece of beautiful ‘red’ granite from Red Beach in Maine. You can see the reddish-pink feldspars and the dark grey glassy quartz grains. If you look very close you may see some black minerals which as a mix of mica and hornblende – but they make up less than 5% of the rock.
Here is some granite under a simple microscope showing the minerals quartz and in this case a white feldspar. The black minerals are mica and some hornblende.
And finally – if you are new to rock and mineral collecting, or have a child who would like to learn more, check out the book I wrote…
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All about granite