Question

question 8
jewelry is ideally made from a material that is shiny and resistant to scratching. based on its properties, which one of our minerals seen in lab would not make the best jewelry?
o flourite; luster glassy, hardness 6
o calcite; luster dull; hardness 3
o quartz; luster glassy, hardness 7

Explanation:

Jewelry needs to be shiny (good luster) and resistant to scratching (high hardness). Calcite has a dull luster (not shiny) and a low hardness of 3 (not resistant to scratching). Fluorite has a glassy luster (shiny) and hardness 6 (fairly resistant). Quartz has a glassy luster (shiny) and hardness 7 (very resistant).

Answer:

calcite; luster dull; hardness 3