LAVA ROCK

   

 Palmer sells four sizes of volcanic stone:  1/4" Minus Lava Sand, 3/8” Lava Rock, 1/2” - 1” Lava Rock, and 1” – 2 1/2” Lava Rock.  Lava Sand weighs about 0.9 tons per cubic yard and is a key ingredient in our Safeco Field Warning Track Cinders.  Lava Rock is a deep red or maroon colored pumice-like material.  It is very light, weighing approximately 1350-1500 pounds per cubic yard.  Alternatively, 1 ton equals approximately 1.33 to 1.48 cubic yards.  Lava Rock is a permanent, lightweight and easy to apply volcanic stone that won’t rot, blow away, or affect soil composition.  Its natural beauty enhances floral and garden arrangements and is suitable for both indoor and outdoor use.

 Lava Rock is a lightweight decorative rock popular in today’s natural landscapes seeking low maintenance.  The vibrant colors complement and help contrast landscaping elements such as shrubs, grasses and flowers.  Being lightweight, Lava Rock is easy to apply.  It’s durability offers a lasting alternative to beauty bark yet Lava Rock can help maintain soil humidity without attracting insects.

Lava Rock was “created in Nature’s own furnace . . . spewed forth in a magnificent display of red boulders, sand and gravel deep within the earth.  This rare product comes to us in a way that man has not been able to duplicate.”  According to mineralogists at Oregon State University, Lava Rock resulted when steam rose through a volcanic cinder pit after an eruption.  Enough silica dissolved in it to deposit opal on the surface of large bubbles that formed before the cinders solidified.  Non-precious opal is made of silica, oxygen and water.  The ovaline formed before the eruption and is surrounded by the later forming cinder material - the opposite of opal.

     

3/8” Lava Rock Sizing         

1/2”..........100% Passing
1/4”............31% Passing
No. 16.........1% Passing
No. 200.....<1% Passing
 

Density

1/4" Lava Sand:  1 Ton = 1.11 c.y.
1/4" Lava Sand:  1 cy = 1800 lbs.
3/8” Lava Rock : 1 ton = 1.33 c.y.
3/8” Lava Rock : 1 cy = 1500 lbs.
½”-1” Lava Rock : 1 ton = 1.43 c.y.
½”-1” Lava Rock : 1 cy = 1400 lbs
1”-2-1/2” Lava Rock : 1 ton = 1.48 c.y.
1”-2-1/2” Lava Rock : 1 cy = 1350 lbs .

 

Mineral Content

Nitrate Nitrogen.................................4.0 p.p.m.
Phosphorus........................................6.0 p.p.m.
Potassium.........................................59.0 p.p.m.
Zinc.........................................................6 p.p.m.
Iron..................................................10.0+ p.p.m.
Copper...............................................5.5+ p.p.m.
Magnesium.......................................2.0+ p.p.m.
Boron.................................................10.0 p.p.m.
Sulfate.................................................7.0 p.p.m.
Organic Material...........................................5%
PH.........................................................8.2 Units
Calcium..................................1.3 Meq/100 gm*
Manganese...........................0.6 Meq/100 gm*
Sodium...................................0.1 Meq/100 gm*
Cation Exchange Capacity..3.2 Meq/100 gm*
* Milli-Equivalent per 100 grams

 

Sieve sizes, densities, and mineral content do not represent a specification.  The information contained herein is correct to the best of our knowledge but as lava rock mining conditions change, the character and composition of the product may change.  The buyer shall make his/her own determination as to the suitability of the product for buyer’s purposes.