Gold is a soft metal. Both malleable and ductile
For your second question its Diamonds,Rubys, Emeralds.
And for your first question its :Minerals are natural: These substances that form without any human help.
Minerals are solid: They don't droop or melt or evaporate.
Minerals are inorganic: They aren't carbon compounds like those found in living things.
Minerals are crystalline: They have a distinct recipe and arrangement of atoms.
Answer:
1 cal = 0.004187 kJ
1,500,000 cal = 6280.5 kJ
