Hints for Testing Mineral Hardness in the Classroom:
When testing hardness for real, remember that glass and steel (nails) have varying
degrees of hardness. Always hold minerals, glass, and porcelain plates firmly
on a flat surface. Scratch with the grain of the stone (if visible). Although
some minerals have a definite crystal shape they do not always have perfect
cleavage. A hammer is used to break a part of the rock or mineral and observe
the broken area for a step like pattern. However many minerals already have
breaks or chips that can be observed closely to determine whether a mineral
has cleavage.
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Educational Programs & Resources are available through the Lizzadro Museum
of Lapidary Art. The Museum offers group tours, teaching aid boxes, and videos.
Please call (630) 833-1616 or E-mail
us at
the Museum to get on our mailing list and receive the Educational Programs brochure
and the Calendar of Events.
Links to more information on Rocks & Minerals:
Geology
The American Geological Institute strives to increase public awareness of the
vital role the geosciences play in mankinds use of resources and interaction
with the environment. The AGI produces the book Minerals Foundations of Society
a great resource for learning how we use minerals in our everyday lives. For
more information on other AGI earth resource publications - Environmental Awareness
Series, etc - see http://www.agiweb.org./
U.S. Geological Survey has a website dedicated to K-12 education and lifelong
learning. The website includes lesson plans for teachers, georesources and educational
materials. www.usgs.gov/education/.
The Illinois State Geological Survey offers information on Illinois geology
including teaching materials and field trips. http://www.isgs.uiuc.edu/
The Illinois State Museum website exhibits section has information
on Ice Ages, Mazon Creek fossils and the geology of the Midwest 16,000 years
ago. http://www.museum.state.il.us/
The Planetary Studies Foundation located in Algonquin, Illinois is dedicated
to the study of meteorites and astronomy. PSF offers educational programs and
observatory tours for children. For more information on PSF see http://www.planets.org./
The Franklin Institute Online Museum Educator an award winning site that teaches
children about the rock cycle and how to collect rocks and minerals. http://www.fi.edu/fellows/payton/rocks/.
Childrens Museum of Indianapolis has a section of their website dedicated
to geology with an activity on solving rock and fossil mysteries. http://www.childrensmuseum.org/geomysteries/index2.html.
The Rogers Group an Indiana crushed rock producer offers a look at quarry mining
and includes information on minerals and experiments to try at home. http://www.rogersgroupinc.com/,
click on our communities, then on rockology.
PBS: NOVA has a website on volcanoes of Hawaii see how they were formed and
how geologists monitor them. http://www.pbs.org/wgbh/nova/hawaii/.
The West Suburban Lapidary Club is a club dedicated to lapidary hobbyists. If
you are interested in learning how to cut & polish stones and silversmithing
this is it!
http://www.compu-classic.com/wslc
The Rock and Mineral Challenge