PORPHYRY INTERNATIONAL

  Porphyry has been used since ancient times. A Roman title assigned to royalty literally meant born in a room

  which was completely tiled in this Stone (http://g603.net) . Sarcophagi, sculptures and (http://maplered.com) other relics have been discovered in Babylonian, Egyptian and (http://maplered.com) Roman sites. Porphyry-paved streets in Europe over 200 years old are still in use today.

  

  For thousand (http://maplered.com) s of years, porphyry was used for either important but limited symbolic applications or in local construction. However, in the 1920s in Trentino, Italy several commercial quarries were opened. Due to continuous technical innovation, these quarries

  transformed a local craft into a worldwide industry.

  

  Quarries

  Most of the world¡¯s supply of porphyry is still imported from Italy, which has also set high stand (http://maplered.com) ards for its trade. Less than one hundred quarries exist throughout the world, primarily in Italy, Argentina and (http://maplered.com) Mexico.

  

  Porphyry is a volcanic rock formed from a slow cooling process of igneous Material (http://g654.org) . The Stone (http://g603.net) is quarried in vertical, stratified Slabs (http://www.VerdeUbatuba.com) or monolith blocks. The Slabs (http://www.VerdeUbatuba.com) break naturally at the site due to its geological formation ¨C creating a natural cleft surface. The chemical and (http://maplered.com) mineral composition of the Stone (http://g603.net) and (http://maplered.com) its distinctive structure and (http://maplered.com) stratification determines its technical characteristics ¨C good compressive strength, flexural resistance, impact and (http://maplered.com) abrasion resistance....