Matching Pairs Minerals VocabularyOnline version Mineral vocabulary words by Tabitha Najera 1 luster 2 streak 3 Fredrich Mohs 4 vitreous 5 metallic 6 Minerals 7 silky 8 adamantine 9 pearly 10 color 11 dull 12 hardness glassy (70% minerals) smooth ( baby powder) The color left behind when you scratch the mineral on a hard surface pearl like shiny, smooth Most obvious! Least dependable reflects light created the hardness scale in 1822 poor reflectors, rough diamond like (high Shine) how well a mineral resists being scratched looks like metal a naturally formed, inorganic solid with a crystal structure