Porphyry Paving Stone

Porphyry Paving Stone

What is porphyry paving stone?  Porphyry is a type of volcanic igneous rock, which along with granite and other rock formations, make up approximately 95% of the world’s “crust.”  It is different than granite and is made up of over 70% silica, about 14% alumna, 8%...

Latest Newsletter: Summer 2011

See our e-newsletter <a title=”Summer 2011″ href=”http://archive.constantcontact.com/fs058/1011361654422/archive/1106689915049.html”><span style=”color: #0000ff;”>Summer 2011</span></a>,  for updates and...