Glass is made from sand, however sometimes Quartz Stones are moulded into it for decoration.
http://wiki.answers.com/Q/Are+glass+jars+made+of+quartz
Regular glass jars break easily at freezer temperatures. If using glass jars, choose wide-mouth dual purpose jars made for freezing and canning; these jars have been tempered to withstand extremes in temperatures. If standard canning jars (...
http://www.uga.edu/nchfp/questions/FAQ_freezing.html#21
We believe in the genuine integrity of glass to promote the true taste of our yogourt. And by using glass containers, of course, we reduce waste by reusing the jars and recycling the lids.
http://www.pinehedge.com/faq.htm
i do reuse the glass jars that i can but the others i always recycle.
http://www.answerbag.com/q_view/306944?ref=W_Ask&ut...
I always reuse my jars, no matter what size. Large, gallon sized jars from pickles or something like that are cleaned and reused for making suntea. Smaller sized jars, like from jelly or other such things are reused for odds and ends in my ...
http://www.mylot.com/w/discussions/1339616.aspx
"How to Remove Food Smell from Jars" Would you like to reuse glass jars yet can't remove pasta sauce aroma, salsa odor, or garlic odor? Have you tried to clean food odors from jar lids where they lurk? Don't worry; it's not just...
http://askville.amazon.com/place-clean-glass-jars-upsid...
Try a dollar store - they usually have canning jars and other inexpensive containers.
http://www.yelp.com/topic/seattle-where-to-buy-inexpens...