How much does amethyst weigh in kilograms?

Before clocks were invented how did people measure time at night? Why did scientists conclude after discovering bones on the moon? Who is Shackkleton? Which planets have similar diameter? What is the shape of a culumbus cloud? How does the book explain why is the answer of life everything and the universe 42 in the book Hitchhikers Guide to the Galaxy? Is there any planet called lo? How far above sea level is the exosphere? Can you have facts about Zeus? Who made the wedge? Is a full moon is nine times brighter than a half moon? Who is more famous Darth Vader or Albert Einstein? How far is the Andromeda Galaxy from Earth in Light Years? How long is a centicycle? What causes water to condense and become clouds? Is a unique feature of the Earth's environment that aerospace engineers needed to imitate on a spacecraft in order to make manned spaceflight possible? Why didnt Apollo 13 make it to the moon? Who was the 3 scientist to develop a microscope? What is the name of our sun and how does it impact life on Earth? How long after sunset does the new crescent moon set?