Here is an old post on one of my environ pens.
http://www.penturners.org/forum/topic.asp?ARCHIVE=true&TOPIC_ID=3166&SearchTerms=environ
The material is LOTS softer than corian. Environ is made from paper and fiber with a soybased adhesive/resin. They turn very nicely except for the smell. I can only relate it to the smell of a state fair bathroom. Not really bad, just unpleasant. It is really similar to particle board. It drills easily and quickly. It doesn't heat up like corian. I have 3 different colors if you want to buy some blanks. Green, purple, and black. I have to look up what I paid for it to give you a price. I bought a full sheet of each when I was doing some other turning projects. These always get a good response, and with the all natural materials, good to sell to the Sierra Club set.
Rich