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.
How Durable is My Gemstone Jewellery?
First of all a note about the hardness and therefore relative durability of gemstones. To measure hardness, the jewellery industry uses the Mohs scale. This gem-trade standard, conceived by Friedrich Mohs in 1812, measures the ability of a gem or mineral to resist abrasion damage.
Diamond at 10 is the hardest whereas talc at 1 is the softest. Popular gemstones like amethyst and citrine register 7 whereas rubies and sapphires register 9. Most of us come off the beach on the first day with the 3 s’s all achieved - rings caked in sand, sea-salt and suntan lotion. Nude sunbathing, as far as silver and gold jewellery is concerned, is a must! Remember also that sand will scratch the surface of precious metals.
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.