Did you know that the diamond is the hardest natural substance
found on earth?
Did you know that quartz is one of the most common minerals on
Earth?
Did you know that marble forms from metamorphosed carbonate rock,
most usually limestone?
Did you know that basalt is the most common rock on Earth?
Did you know that breccia is a rock composed of generally large,
sharp fragments cemented together?
Did you know feldspars make up more than 50% of the Earth's crust?
Did you know the first recorded use of turqouise dates back to 5000 BC
in Mesopotamia, where people used the gemstone to make beads?
Did you know lapis lazul is treasured for its rich blue color and
is often used in jewelry? Did you also know that ancient Eqyptians
used powdered lapis lazul as eye shadow?
Did you know jade because of it's toughness has been used for many
cultural things like hammers, fish hooks, and stone axes.
Did you know that rubies are one of the most popular gemstones today.
Did you know that the first geologist on the moon was Harrison Schmitt
who was part of the Apollo 17 mission? From the rock samples he collected, scientists have been able to learn many things about the moon.
Did you know that the Earth is approximately 4.8 billion years old?
Did you know that gold is so soft and easily worked that you could
roll an ounce of it into a hair-thin wire 50 miles long?
Did you know that the biggest pure-gold nugget was found in Australia
in 1869 and weighed 156 pounds?
Did you know that platinum is so rare that two million pounds of ore may
contain only one pound of metal?
Did you know that geodes are dull balls of igneous or sedimentary rock
on the outside,
but contain beautiful crystals on the inside?
Did you know that meteorites, rocks from space, help scientists learn
about the solar system and are very valuable, too?
Did you know that the Taj Mahal built between 1632 and 1654 in India is
made entirely out of marble?
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