The definition of a gem is "a precious stone, cut and polished for jewelry. They are all minerals. Some highly desirable gemstones may not be suitable for jewelry, yet be very collectible, like sphene. Others, like those in the corundum family, are prized for color and hardness, like emeralds and diamonds. Further, some common minerals, when polished, make beautiful pieces. With all that said, i woukd go with rarer.
<span>a. It melts at 1455oC I know this is correct I need One more</span>
population is the number of species living in a given area if this is regarding biology or earth studies :)
The pebbles become smooth and even because of erosion. the waves from the sea rub against the pebbles this is erosion. x
The answer is the first one because it’s a compound of two words separate when you say it :) hope this helps !