Rocks, Fossils, and Minerals for Sale
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Brazilian Agate Slabs For SaleBrazilian Agate Slabs

   
Rocks, Minerals, and FossilsThese Brazilian Agate Slabs are slices of Brazilian Agate Geodes that have been cut and polished to a smooth glassy finish on both sides, with the edges left rough.  The average slab thickness is 0.25"; the dimensions shown reflect the maximum length and width.

Geodes are spheroidal masses that form inside hollow cavities in volcanic or sedimentary rocks, most commonly basaltic lavas and limestones.  The cavities themselves may have been gas bubbles in magma, or may have formed when nodules inside sedimentary rocks dissolved.

As mineral-laden groundwater or hydrothermal fluid seeps through the hollow cavities, chemical precipitation begins to fill the hollows from the outside in, often forming concentric layers.  Geodes commonly have a cryptocrytalline quartz shell lined by various other minerals like calcite, pyrite, celestite, and macrocrystalline quartz, often in crystals visible to the naked eye.

Some Agate Geodes mined in Brazil are dyed using a 19th-century process developed in Germany.  Agate is relatively porous, and this process, which involves heating the agate to a high temperature, allows the dye to be absorbed throughout the rock, not just on the surface.  Usually agate without much natural color or pattern is selected for dyeing.  The purple, blue, pink, and teal Agate Slabs on this page have been dyed using this process.

The Black Iron Stand at the bottom of the page may be purchased separately to display your slab.



Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (A)
Length: 5.6"    Width: 5.25"
$25.00
Add to Cart
Brazilian Agate Slab (B)
Length: 5.75"    Width: 5.5"
$26.00
Add to Cart
 
(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale1
Brazilian Agate Slab (C)
Length: 5.5"    Width: 4.75"
$22.00
Add to Cart
Brazilian Agate Slab (D)
Length: 5.25"    Width: 5"
$24.00
Add to Cart
   
     
 
     
 
Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (E)
Length: 5.25"    Width: 4.7"
$20.00
Add to Cart
Brazilian Agate Slab (F)
Length: 5.5"    Width: 4.5"
$22.00
Add to Cart
      
(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)


Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (G)
Length: 6.5"    Width: 4.2"
$24.00
Add to Cart
Brazilian Agate Slab (H)
Length: 5.5"    Width: 5"
$24.00
Add to Cart
 
 
 
 
Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (I)
Length: 5.5"    Width: 4.5"
$25.00
Add to Cart
Brazilian Agate Slab (J)
Length: 5.25"    Width: 4.5"
$24.00
Add to Cart
 
(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)
 

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (K)
Length: 5.5"    Width: 5.5"
$29.00
Add to Cart
Brazilian Agate Slab (L)
Length: 6.75"    Width: 5"
$28.00
Add to Cart
    
(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)
 

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (M)
Length: 3.75"    Width: 3.5"
$12.00
Add to Cart
Brazilian Agate Slab (N)
Length: 5.25"    Width: 4.25"
$20.00
Add to Cart

  
  

  

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (O)
Length: 5"    Width: 4.5"
$22.00
Add to Cart
Brazilian Agate Slab (P)
Length: 5.25"    Width: 4.8"
$20.00
Add to Cart

(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)


Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (Q)
Length: 5.25"    Width: 5.25"
$20.00
Add to Cart
Brazilian Agate Slab (R)
Length: 6"    Width: 4.75"
$26.00
Add to Cart

  
   

  

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (S)
Length: 4.5"    Width: 4"
$18.00
Add to Cart
Brazilian Agate Slab (T)
Length: 6"    Width: 5"
$24.00
Add to Cart
 
(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)
 
 
Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (U)
Length: 5.5"    Width: 5.2"
$22.00
Add to Cart
Brazilian Agate Slab (V)
Length: 5.75"    Width: 4.75"
$22.00
Add to Cart

 

    

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (W)
Length: 6.25"    Width: 4.75"
$22.00
Add to Cart
Brazilian Agate Slab (X)
Length: 5"    Width: 4.5"
$24.00
Add to Cart


(On this page, you'll receive the exact Brazilian Agate Slab shown in each photo.)

  

Brazilian Agate Slabs For Sale
Brazilian Agate Slabs For Sale
Brazilian Agate Slab (Y)
Length: 5"    Width: 4.75"
$24.00
Add to Cart
Brazilian Agate Slab (Z)
Length: 5.25"    Width: 4.9"
$24.00
Add to Cart


 

Brazilian Agate Slabs For Sale Metal Slab Stands For Sale
Black Iron Stand
4.5" x 2.25" x 2.75"
(Holds any Agate Slab on this page -
Slab not included)

Add to Cart         $6.00
Brazilian Agate Slabs For Sale
Rocks Minerals Fossils Shopping Cart
 
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Mother Lode Rock Shop
PO Box 1812
Nevada City, CA 95959
info@rocksmineralsfossils.com