Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Smiley face slide HELLO!!!!!! slide Rocks and Minerals By Trevor Facts about rocks and Minerals Diamond is the hardest natural substance found on Earth. Quartz is one of the most common minerals on Earth. Marble forms from metamorphosed carbonate rock, most usually Limestone. Basalt is the most common rock on Earth Feldspars make up more than 50% of the Earth's crust Rubies are one of the most popular gemstones today Earth is approximately 4.8 billion years old. The biggest pure-gold nugget was found in Australia in 1869 and weighed 156 pounds. What Are Minerals? Minerals are made from 92 elements that join together in many different ways. Some minerals are made of only one element such as silver. Most are combined of two or more elements such as granite which is made of quartz, feldspar, mica. Scientists have identified over 3,000 minerals. The particles of minerals are arranged in a repeating pattern called a crystal. Recognizing a mineral is not an easy job. There are several different properties of minerals and tests that are used to identify them. The properties are: luster, hardness, color, streak, cleavage, crystal shape, and magnetism. Challenge yourself to identify minerals. Pictures of different rocks and minerals More facts about rocks and minerals Platinum is so rare that there is two million pounds of contain and only one pound of metal. Meteorites, rocks from space help scientists learn about the solar system and are very valuable, too. The Taj Mahal built between 1632 and 1654 in India is made entirely out of marble. Thanks for watching BY