Pegmatite mines,feldspar and industry

Feldspar

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feldspar in industry

Not another pegmatite article!Oh yes I like writing about pegmatites.Not to mention they are a favorite place for collecting rocks and minerals.If you have read my articles you know feldspar is a major component in pegmatites.New York and New England have many old pegmatite mines.Most of these mines were originally mined for mica.Some however were feldspar mines.

Feldspar has long been used in ceramics,porcelain,china and earthenware.The feldspar is a major portion of the body of these wares and acts as a flux.Earthenware is one of the oldest pottery materials.Earthenware has about 15% feldspar in the mix. In porcelain the high glaze that feldspar provides makes it ideal for bathroom fixtures and tiles.And those lovely china dishes and tableware contain feldspar.

Feldspar is used in glass making.Here again as a flux,which simple means it lowers the melting point of the glass making process.The alumina content of feldspar provides resistance to bending,thermal shock and impact to glass.The glass industry consumes 60% of the feldspar production and is the number one user of feldspar.

So early on the feldspar was used in ceramics and glass making.But did you know it was used as chicken grit?Chickens and poultry need grit to digest food.They store the grit in the gizzard where it acts like teeth to grind up the food.

Feldspar is also used as a filler.it is used in paints,plastics,rubber and adhesives as a filler ingredient.It is used to make abrasive wheels and discs as a bonding and filler.Soaps,cement,concrete,textiles and paper use feldspar as a filler.It is used in fertilizer and applied to paper tar roofing. It is an ingredient in Bon Ami cleaner and other abrasive cleaners.

Feldspar is mined worldwide.Italy is the main producer.The Middle East and China produce a major percentage of the worldwide output.

Feldspar has a long history of use in pottery.The earliest pottery dates to over 20000 BCE!Here in the US the old pegmatite mines date back to the 1800s.They provided jobs for miners and industries.Today the old pegmatite mines are closed and forgotten places.Places fading into history and many being overtaken by nature again.Others are the favorite places to visit for rockhounds and other back to nature types.

Worldwide production

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earthenware

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porcelain

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ceramic tiles

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Comments 7 comments

Harlan Colt profile image

Harlan Colt 5 years ago from the Rocky Mountains

We have a good mix of igneous and sedimentary formations which offer good rockhound excursions.

Potasium feldspar (KAlSi3O8) has always been one of my favorite for rock borders in the garden that and the basalt columns always make a nice border if you can lift them into the truck. I really enjoyed this hub, (but you might add a few pics).

-Best Wishes

-Harlan


glowingrocks profile image

glowingrocks 5 years ago from New York Author

Thanks Harlan

I add some photos.


vocalcoach profile image

vocalcoach 5 years ago from Nashville Tn.

Enjoyed this hub. I really like the photos - helps me to understand. Thanks. rated up. vocalcoach


glowingrocks profile image

glowingrocks 5 years ago from New York Author

Glad you liked it vocalcoach.I need to include more photos in my hubs.Always learning from all of the great writers here on Hubpages.

Thank you.


Harlan Colt profile image

Harlan Colt 5 years ago from the Rocky Mountains

the pics are awesome! way cool!

-Harlan


glowingrocks profile image

glowingrocks 5 years ago from New York Author

Thank you Harlan for saying so.Good advice those pics!


geetha dubey 4 years ago

we are having a very big Pegmatite deposit in India which contains various minerals especially ceramic, pot/sod/alkali feldspar, quartz, silica sand, muscovit book mica, cryustal garnet, vermiculite, china clay and ball clay etc.,

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