By Susan Tejada, Steve Seymour, Ed French
Do you know that the complete international lies at your toes? particularly! Rocks and minerals are like little home windows at the internal workings of Planet Earth. you simply need to be aware of the place to discover them and what you're looking at. that is the place Dig It! is available in. packed with palms on actions and enjoyable proof, it will train you the fundamentals of rocks and minerals and the way they make a distinction in exactly approximately all the pieces of your existence. you are going to additionally locate tips about discovering and development a rock number of your own, and magazine pages for conserving a list of your finds.
even if you're sticking as regards to domestic or are wandering farther afield, you'll find lots of cool rocks and minerals with a little bit attempt. we have even given you a starter assortment. So what are you looking ahead to? seize Dig It! and begin digging!
Read or Download Dig It: How to Collect Rocks and Minerals PDF
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Additional info for Dig It: How to Collect Rocks and Minerals
How do we know what prehistoric plants and insects looked like? They may be perfectly preserved in a piece of clear golden amber. MINERAL HALL OF FAME ● ● ● Most common mineral: quartz Hardest mineral: diamond Mineral with greatest color range: tourmaline Animals make gemstones, too. Oysters and other shellfish make pearls. When a grain of sand gets inside an oyster’s shell, it may cover it with nacre (pronounced “NAY-ker”). Over time, the nacre will build up and into a pearl. Coral is made from the skeletons of tiny sea animals called coral polyps.
But because they are not as rare, they are less valuable. These are called semiprecious gems. Garnet, tiger’s eye, agate, and jasper are just a few of the semiprecious gems. 28 HAPPY BIRTHDAY! Birthstones were born in the 1700s. That’s when people in Poland started to wear gems that were “matched” to their birthdays. The birthstones we use today were chosen by a group of American jewelers in 1912. January Garnet February Amethyst March Aquamarine April Diamond May Emerald June Pearl July Ruby August Peridot September Sapphire October Opal November Topaz December Turquoise TREASURE HUNT Some rock mines are open to the public.
Crack one open and you might find quartz crystals surrounded by layers of agate. And at room temperature, mercury isn’t even solid—it’s a liquid! Some minerals can take different shapes at different times. Take staurolite. This mineral is also called fairy stone when it comes in the shape of a cross. Why? Legend has it that fairies wept when they heard of Christ’s death, and their tears turned into crosses. In fact, heat and pressure cause the crystals to grow at right angles to each other. You’re not seeing through this ulexite.