Diamond (gemstone) Diamond (gemstone) A diamond (from the "adámas", meaning "unbreakable", "proper", or "unalterable") is one of the best-known and most sought-after gemstones. Diamonds have been used as decorative items since ancient times; some of the earliest references can be traced to 25,000 - 30,000 B.C. The hardness of diamond and its high dispersion of light—giving the diamond its characteristic "fire"—make it useful for industrial applications and desirable as jewelry. Diamonds are such a highly traded commodity that multiple organizations have been created for grading and certifying them based on the "four Cs", which are color, cut, clarity, and carat. Other characteristics,
ARIA Award for Best Rock Album which consists of 1000 members from different areas of the music industry, and is given to a solo artist or group who is either from Australia or an Australian resident. The award for Best Rock Album has been won by Powderfinger the most time, with three wins, for: "Internationalist" (1999), "Odyssey Number Five" (2000) and "Vulture Street". In the following table, the winner is highlighted in a separate colour, and in boldface; the nominees are those that are not highlighted or in boldface. ARIA Award for Best Rock Album The ARIA Music Award for Best Rock Album, is an award