Article: Diamonds are cubic, while other similar stones like quartz are hexagonal. Look down at the point of the crystal and count the number of sides. If there are 4 sides, there’s a possibility the crystal is a diamond. If there are 6 sides, it means that it’s likely a quartz crystal.  The visual test is a quick way to rule out other gemstones but is not a definitive test. If you see 4 sides in the crystal, use additional methods to verify that it is, in fact, a diamond. Corundum is another kind of crystal that's slightly less hard than a diamond. Purchase a cheap piece of corundum or buy a mineral testing kit that includes corundum. Hold the corundum firmly against a table and scrape the suspected diamond against the corundum. If it creates a visible scratch, the crystal is a diamond. If it doesn’t create a scratch, then it is a different mineral. The Mohs Hardness Scale scientifically rates crystals by hardness. Diamonds are a 10 on the scale while corundum is rated a 9. This is why it creates a scratch when you rub the two crystals together. You can purchase a diamond tester online. Check the device to see if it has a full battery by making sure that the green light is on. Then, press the tip of the tester against the suspected diamond. If it makes a noise and lights up, the mineral is a diamond. If it doesn’t, then it is a different kind of gemstone.  Diamond testers use thermal and electric conductivity to determine whether your gemstone is a diamond. Cheaper diamond testing devices may not be as accurate as more expensive models. #*Read customer reviews before you make your purchase.
Question: What is a summary of what this article is about?
Look down at the top of the crystal and count the sides. Scrape the crystal against a piece of corundum. Use a diamond tester instead of using a scratch test.
Article: Having the details of your trip will make it easier to cancel your reservation over the phone. Go to https://www.expedia.com and click the “My Trips” to log in to your account and view your vacation itinerary details. Use +1 404-728-8787 if you are calling from outside of the U.S. Use a touch-tone phone or cellphone to call the support line. Once you connect to the phone number, you’ll be directed to an automated system. Choose the language you want to use, then hit 4 to go to cancel your hotel reservation. Once you hit 4, you'll have to enter your itinerary number into your phone.
Question: What is a summary of what this article is about?
Obtain your hotel reservation itinerary. Call 800-397-3342 in the USA or +1 404-728-8787 internationally. Follow the automated prompt directions.
Article: In many cities, it is common to find two buildings separated by only a narrow alley. The ideal distance would be a little greater than the distance between your elbows when you extent both of your arms out to the side. Your left hand and foot will go to one wall, while your right hand and foot will go to the other. Apply pressure to both walls simultaneously in order to hold up your body's weight. As you do so, you will have to increase the pressure you apply with the other hand or foot that is on that particular wall.
Question: What is a summary of what this article is about?
Find two walls that are close together. Place the hand and foot of each side of your body onto one wall. Move one hand or foot up at a time.