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Most gemstones, such as topaz, rubies, sapphires, emeralds, and diamonds, have a common mineral property that makes them gemstones. What is this property? Is that property responsible for their economic value? Why or why not? =================================================== GLG 220 Week 1 Mineral Identification Worksheet (UOP) FOR MORE CLASSES VISIT www.glg220edu.com Resources: Ch. 2 of the text, Virtual Minerals Lab, Mineral Identification Key II and Appendix 2 • Read the Introduction located via the Table of Contents,Section 1 at Mineral Society of America’s Mineral Identification Key II available at the following link: http://www.minsocam.org/MSA/collectors_corner/id/mineral_id_keyi1. htm#Intro After reviewing the introduction return to Table of Contents and read about the Mineral physical property Hardness. • Conduct the hardness test of the Virtual Minerals Lab located in the Materials section of your student Web site. Record your answers in Appendix 2 - Part 1. • Review the additonal physical properties discussed in the resources above. Using the information gained from the concepts discussed in your readings and Lab activity, read and record the answers to the questions posed in Appendix 2 – Part 2. =================================================== GLG 220 Week 1 Summary Questions FOR MORE CLASSES VISIT www.glg220edu.com