#1  
Old 10-13-2010, 04:14 PM
Faith In Virginia's Avatar
Master Builder
 
Join Date: Oct 2010
Location: Virginia
Posts: 720
Default Question on stone slab identification

I need some advice please. I just got finished building my bread oven and I had thoughts of making it portable. After layers and layers of heavy material I know that I will need my big trucks for moving it around. So I was thinking of building a comparably lighter pizza oven for the transportable oven.

Now I've had this slab of stone for years it's about 1-1/4" thick jet black with no variation in color. It's quite smooth like slate but not slate. It's very hard and does not scratch easily and you can tell the stone is quite dense. I'm thinking of using it as the floor to a pizza oven (I know one piece is not recommended)

Any thoughts of what this slab is and if its usable for a floor, This slab is big and heavy so I can't just through it in the car and find a stone identifying expert.

Thanks for your thoughts
Reply With Quote
  #2  
Old 10-14-2010, 06:46 PM
brokencookie's Avatar
Journeyman
 
Join Date: Oct 2007
Location: Pacific Northwest
Posts: 376
Default Re: Question on stone slab identification

It is probably granite. 1 1/4 inch is the standard thickness for this material. It is not recommended for ovens. Other stones have a different standard thickness. Since is it smooth I am assuming that it is a "finished" piece of stone and thefore is the 1 1/4 inch standard granite slab. The difficultiy in creating a scratch also leads me to believe that it is granite. Search the forum for flame polishing and you will get quite a bit of info on why granite is a poor choice.

The other choices I can think of are

Quartize - artifical stone- generally 3/4 in
Marble - 1.5 to 2 in

Soapstone is usually the same 1 1/4 in thickness but it is not has common. If you can weight the stone and figure the square footage you can determine which you have

Granite = about 18 lbs per sq ft ( 1 1/4 in thick)
Soapstone = 20 lbs per sq ft (1 1/4 inch thick)

Good luck
__________________
Sharpei Diem.....Seize the wrinkle dog

Last edited by brokencookie; 10-14-2010 at 06:47 PM. Reason: spell check
Reply With Quote
  #3  
Old 10-14-2010, 07:00 PM
Tscarborough's Avatar
Il Pizzaiolo
 
Join Date: Oct 2009
Location: Ausitn
Posts: 2,861
Default Re: Question on stone slab identification

All granite shows granularity. If there are no grains, it is probably soapstone. I still would not make a one piece floor.

As I tell people when they are considering the options of a concrete patio versus a segmental paver patio, "all of the cracks are engineered in" on the segmental pavers.
Reply With Quote
  #4  
Old 10-14-2010, 09:59 PM
Faith In Virginia's Avatar
Master Builder
 
Join Date: Oct 2010
Location: Virginia
Posts: 720
Default Re: Question on stone slab identification

Thanks for the reply's and the great information. I have been sitting on this 4'x5' slab for about 30 years and looking for some use for it. I can get a scale to it so that will be a great start. If it's soapstone then I could always cut it into smaller blocks? Thanks Faith
Reply With Quote
  #5  
Old 02-02-2011, 06:31 PM
GianniFocaccia's Avatar
Il Pizzaiolo
 
Join Date: Jun 2009
Location: Disneyland, CA
Posts: 1,312
Default Re: Question on stone slab identification

Faith,

I just found this thread and wanted to reply. If it is indeed soapstone, it is very easy to cut! I cut mine with an inexpensive 41/2" wet saw that was given to me (retail about $59 I think). The soapstone pieces that I bought (Craigslist) came in 3cm (1 1/2") slabs and all I did was trim the ends using a circular template. Maybe you can post a photo and we can all take a guess at what you have.

John
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Concrete slab question fxpose General Building and Construction 185 04-02-2010 10:12 AM
structural slab question rbigante Pompeii Oven Construction 5 09-29-2008 10:42 AM
new project - question 1 - stone slab? sakitome Newbie Forum 8 10-22-2006 05:34 PM
New hearth slab design question DrakeRemoray Pompeii Oven Construction 6 04-24-2006 01:42 PM
Question about isolated hearth slab Alan Getting Started 26 07-21-2005 07:00 PM


All times are GMT -7. The time now is 01:18 PM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC