Wisconsin Geological Society
2010 Events
2010 Gem, Mineral, and Fossil Show
The 53rd Annual Wisconsin Geological Society Gem, Mineral, and Fossil
Show will be held on Saturday May 15th and Sunday May 16th 2010 from
10:00am to 5:00pm each day. The show will be held indoors at the
Muellner Building at Hart Park in Wauwatosa, WI.
Download
the
flyer
here
WGS Lapidary Study Group
The next meeting of the Lapidary Study Group will be held on Tuesday,
March 9th, at 11:30 am, at the McGovern Park Community Center;
4500 West Custer Avenue;
Milwaukee, Wisconsin.
The April Meeting will be on Tuesday the 13th, and there are no
scheduled meetings after April until fall. Contact: Ed Fyrnys
(414) 258-5761
WGS Mineral Study Group
The Mineral Study Group will meet Thursday March 18th at 1:00PM at Norb
Badten's house: 2650 N. 64th Street, Wauwatosa, WI.
Contact: Lloyd Brown (414) 258-5761
WGS Fossil Study Group
The Fossil Study Group will meet Thursday March 25th at 1:00PM at Norb
Badten's house: 2650 N. 64th Street, Wauwatosa, WI.
Contact: Lloyd Brown (414) 258-5761
Rock Identification
- Minerals are natural, inorganic solids with a consistent composition—a chemical formula. Each mineral also has a unique arrangement of atoms, expressed in its crystal form (or habit) and its hardness, fracture, color and other properties. Organic natural substances, like petroleum or amber, are not called minerals.
- Igneous: A tough, frozen melt with little texture or layering; mostly black, white and/or gray minerals; may look like lava Sedimentary: Hardened sediment with layers (strata) of sandy or clayey stone; mostly brown to gray; may have fossils and water or wind marks
- Metamorphic: Tough rock with layers (foliation) of light and dark minerals, often curved; various colors; often glittery from mica