Question

question 9
what property would be the most important when choosing what mineral would make the best jewelry?
hardness
crystal shape
streak color
light refraction

Explanation:

Jewelry needs to withstand daily wear and tear. Hardness determines a mineral's resistance to scratching. A harder mineral (like diamond, which has a high hardness on the Mohs scale) is less likely to get damaged, making it suitable for jewelry. Crystal shape can be altered by cutting, streak color is more relevant for mineral identification in a powder form (not for jewelry aesthetics or durability), and while light refraction (which gives sparkle) is important, without sufficient hardness, the jewelry would get easily damaged and lose its appearance over time. So hardness is foundational as it ensures the jewelry lasts.

Answer:

hardness