Gel bracelets or jelly bracelets or Awareness bracelets
Gel bracelets or jelly bracelets are an inexpensive type of wristband similar to a large diameter O-ring. Awareness bracelets gained in popularity in the 2004 when the Lance Armstrong Foundation introduced its trademark yellow silicone Livestrong wristband to raise support for cancer research. They come in a variety of colors, and dozens can be worn on each arm.
They have been popular in waves throughout the Western world and elsewhere since the 1980s. By early 2005, silicone wristbands became popular with many charities, such as Make Poverty History and the BBC's Beat Bullying campaign. One style of these wristbands, known as awareness bracelets, carry embossed messages demonstrating the wearer's support of a cause or charitable organization. In general, the color of the band describes its cause, and the colors are often the same as the colors of awareness ribbons.
A gemstone is a stone that is beautiful
A gemstone is a stone that is beautiful, rare, and durable resistant to abrasion. Today, finer gemstone specimens are available to the average person than at any time in history.
Nowadays such a distinction is no longer made by the trade. Rare or unusual gemstones, generally meant to include those gemstones which occur so infrequently in gem quality that they are scarcely known except to connoisseurs, include andalusite, cassiterite and bixbite. Some minerals can be very beautiful, but they may be too soft and will scratch easily (such as the mineral fluorite). Fluorite is extremely colorful and pretty but has a hardness of only 4 on the hardness scale and has four perfect cleavage directions, which makes it only an oddity as a cut gem.
A diamond is a form of carbon
A diamond is a form of carbon that was created deep within the core of the earth more than 3 billion years ago and brought to the surface by volcanic eruption. In diamond, each carbon atom is bonded to four other carbon atoms in a tetrahedral structure, like a pyramid.
Each link or bond is the same length, and the tetrahedral formation is therefore completely regular. Theoretically a perfect diamond crystal could be composed of one giant molecule of carbon. After the magma cooled, it solidified into kimberlite, where the precious rough diamond is still found today. It is the strength and regularity of this bonding which makes diamond very hard, non-volatile and resistant to chemical attack.