Middle schoolers research and create a poster about a gemstone. In this mineral properties instructional activity, students view a video about diamonds. They discuss the properties of minerals and choose a gemstone to research and create...

In this earth science quiz worksheet, students respond to 20 short answer and true or false questions regarding earth science topics.

Young mathematicians can work these word problems to practice applying their two-digit multiplication and division to the 12s. Designed for use by learners in the UK, money problems are in denomination of pounds and pence, and cultural...

In this averages worksheet, students complete word problems containing averages of money, kilograms, height, and more. Students complete 20 problems.

For this chemical families worksheet, students answer 8 multiple choice questions including identifying characteristics of families in the periodic table and answering specifics about each family.

Site provides many facts about rubies, including properties and where rubies are found. Also provides further information and pictures of the gem itself.

This commercial site gives information on rubies, including their physical properties and where they are found. Includes some details on how to choose a ruby for purchase.

This site gives general information about the gem, ruby. Also included is information about hardness, color, uses, and other physical characteristics

This commercial site contains general information on various synthetic and natural gemstones and provides links to specific gems.

This is a commercial site, but it has some very good complete information and pictures. You must search for "ruby" in the alphabetized list on the left toolbar.

This site from the Wikipedia encyclopedia gives a definition and information on hardness, value determination, and natural versus artificial rubies. Links are provided throughout for additional information on related subjects.