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Ruby

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A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). The red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires. The ruby is considered one of the four precious stones, together with the sapphire, the emerald, and the diamond.
Prices of rubies are primarily determined by color. The brightest and most valuable “red” called pigeon blood-red, commands a huge premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions may indicate that the stone has been treated. Cut and carat (weight) are also an important factor in determining the price.
Rubies have a hardness of 9.0 on the Mohs scale of mineral hardness. Among the natural gems only moissanite and diamond are harder, with diamond having a Mohs…

Ruby MI

Learn How to Master Skate boarding in a 7 Day Class Skateboarding is a recreational activity, a work of art, or a method of transportation. Skateboarding has been shaped and influenced by many skateboarders throughout the ages. A 2002 report by American Sports Data discovered that there were 18.5 million skaters in the world. 85 […]

Ruby SC

Discover How to Master Skateboarding in a 7 Day Course Skateboarding is a leisure activity, an art form, or a method of transportation. Skateboarding has been shaped and influenced by many skateboarders throughout the ages. A 2002 report by American Sports Data uncovered that there are 18.5 million skateboarders in the world. 85 percent of […]

Ruby VA

Find out How to Master Skateboarding in a 7 Day Class Are you having trouble learning how to skateboard? Is the fear of falling keeping you from progressing? Be taught all of the fundamentals of skateboarding quickly in a one-week camp. We will teach you the basics of skateboarding such as how to balance, push, […]

Ruby NY

Discover How to Master Skate boarding in a 7 Day Course Are you having trouble learning how to skateboard? Is the fear of falling keeping you from progressing? Learn all of the fundamentals of skateboarding fast in a one-week camp. We will show you the principles of skateboarding such as how to balance, push, turn, […]