Win a copy of Straw Bale Building Details this week in the Straw Bale House forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • paul wheaton
  • Anne Miller
  • Mike Jay
  • Jocelyn Campbell
stewards:
  • Devaka Cooray
  • Burra Maluca
  • Joseph Lofthouse
garden masters:
  • Dave Burton
  • Greg Martin
gardeners:
  • Mike Barkley
  • Shawn Klassen-Koop
  • Pearl Sutton

Granite dust  RSS feed

 
Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Would it be ok to use granite dust as a type of rock dust to amend my soil?
 
gardener
Posts: 1870
Location: Just northwest of Austin, TX
243
forest garden urban
  • Likes 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Absolutely.  It really is a type of rock dust and in my area granite is a common ammendment.   We're on limestone based soils here, so while I don't know exactly what minerals it brings,  I trust it adds some valuable variation.   With that in mind, I don't know if it would be as helpful in other soil types.
 
gardener
Posts: 5719
Location: Vilonia, Arkansas - Zone 7B/8A stoney, sandy loam soil pH 6.5
810
books chicken dog duck fish forest garden fungi homestead hugelkultur hunting pig
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I have to agree strongly with Casie on using granite dust to amend limestone base soils, even sandstone base soils benefit greatly.
Granite rock dust is a great amendment for soils that lean to the basic side of the pH scale, granite base soils lean towards the acidic side so they are very useful in pH balancing.

Most Granites will contain in the vicinity of 50-60 minerals, most will be compound minerals with some crystallization of items such as silica.
 
Michael Olivera
Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thank you both for sharing that information with me
 
pollinator
Posts: 2186
328
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
What is the source? Around here we have decomposed granite. Its like a crumbly sand and is used for ammending.  With dust i think of byproduct from slab shops. Some slabs have fiberglass/resin backing. Some slabs are resin core(silestone,  etc). The dust cant be separated between slabs that have it or dont have it.
 
pioneer
Posts: 723
Location: 4b
106
bee building dog forest garden trees
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

wayne fajkus wrote:Some slabs have fiberglass/resin backing. Some slabs are resin core(silestone,  etc). The dust cant be separated between slabs that have it or dont have it.



That very thing kept me from getting "rock dust" from a local company here that makes counter tops.  They have really beautiful pieces of rock they cut, and I thought that would be a great place to get rock dust until I saw just what you are talking about.  Now I'm looking for a source again.
 
Michael Olivera
Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

wayne fajkus wrote:What is the source? Around here we have decomposed granite. Its like a crumbly sand and is used for ammending.  With dust i think of byproduct from slab shops. Some slabs have fiberglass/resin backing. Some slabs are resin core(silestone,  etc). The dust cant be separated between slabs that have it or dont have it.


Good point
 
Bryant RedHawk
gardener
Posts: 5719
Location: Vilonia, Arkansas - Zone 7B/8A stoney, sandy loam soil pH 6.5
810
books chicken dog duck fish forest garden fungi homestead hugelkultur hunting pig
  • Likes 2
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
If you are trying to source rock dust, look for shops that buy the quarry blocks and cut their own slabs, those will not have anything but pure rock dusts as a result of their cutting operation.

Where I am we have one shop that does counters that buys quarry blocks and cuts their own slabs as needed, we also have two "monument" companies that buy their granites in quarry blocks and do all their own cutting and polishing.
I have gotten dusts from both of these companies for free, all I have to do is bring containers and my scoop and broom. They get free cleanup work, I get free rock dust.
By the way, quarry blocks are usually measured in tons (I got to see a brand new deep red granite come in and it weighed 40 tons.)

Tip: lf the shop only has precut slabs, they will have some type of "backer" attached to prevent fractures during shipping to the shop.
 
And inside of my fortune cookie was this tiny ad:
permaculture bootcamp - learn permaculture through a little hard work
https://permies.com/wiki/bootcamp
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!