A Showcase of our products by Application
Perlite Information
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Physical Proprties

Physical Characteristics 

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Why Perlite Works

How Perlite Works

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Perlite Garden

Gardens In the Sky

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Perlite Garden

Gardens In the Sky

Information presented with the

curtesy of the Perlite Institute

Perlite Origin and Characteristics

Perlite is a naturally-occurring siliceous rock. The distinguishing feature that sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it expands from four to twenty times its original volume.

While the crude rock may range from transparent light gray to glossy black:

 

 

 

 

 

 

the color of expanded perlite ranges from snowy white to grayish white.

 
Why Perlite Works

Expanded perlite particles are clusters of minute, lightweight, insulating, glass bubbles. Its unique internal structure, together with a large exterior irregular surface composed of broken bubbles and surface openings provide for water and air holding capacity.

 

 

Its internal structure resists thermal transmission, and crushed particles present a maze of microscopic pathways that can be used to filter and clean a wide array of liquids

Norcal Metal Test Analysis 

The Test Analysts results on

metallic content for our

perlite Products

The Expansion Process

 

This expansion process also creates one of perlite's most distinguishing characteristics: its white color.

This expansion is due to the presence of two to six percent combined water in the crude perlite rock. Expanded perlite can be manufactured to weigh as little as 2 pounds per cubic foot (32kg/m3), making it adaptable for numerous applications.

 

 

 

Click on the picture above for s slide show of France expanding perlite

 

Because perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7All of our perlite is OMRI and CDFA Organic input material Certified.

Expanded Perlite:

The expanded product in various grades, with white snowy characteristic