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$100 $100 $100 $100 $100 The least reliable characteristic used in identify a mineral This is used to produce specific types of laser light. This gem is made from quartz that contains iron The process of melting a substance to separate the metal $200 $200 $200 $200 $200 The number of elements that form 98% of Earth’s crust. The least reliable characteristic used in identify a mineral This is used in timepieces and electronics. This is where the Great Star of Africa can be found Minerals that are left behind when fluids run through weaknesses in rock are called $300 $300 $300 $300 A six sided shape $300 The two main elements making up the silicate mineral group. The way a mineral reflects light. A mineral or rock that contains enough of a useful mineral that it can be mined at a profit This gem comes from the mineral spinel The hardness of a mineral that cannot be scratched by your fingernail, but can be scratched by a steel nail $400 $400 $400 $400 $400 $400 The name of two processes by which crystals form. Quartz belongs to this group of minerals The ratio of the weight of a mineral compared an equal volume of water This is refined from bauxite. This mineral vibrates when exposed to an electric field These minerals are used in the production of titanium $500 This determines the size of a crystal formed from magma. $500 This mineral forms when too much of a substance is dissolved in water. *like the ocean $500 The color of a mineral when it is in a powdered form $500 This is used in wheelchairs and eyeglass frames $500 The weight of the Hope diamond in carats or grams $500 Requirements for being a mineral $200 A solid in which the atoms are arranged in orderly, repeating patterns $300 $100 In this group the minerals contain silicon and oxygen. This mineral is magnetic