Diamond is an allotrope of carbon. It is the hardest known natural material and the third-hardest known material after ultra hard fullerene. Its hardness and high dispersion of light make it useful for industrial applications and jewelry. Diamonds are specifically renowned as a material with superlative physical qualities. They make excellent abrasives because they can be scratched only by other diamonds, Borazon, ultra hard fullerene, or aggregated diamond nimrods, which also means they hold a polish extremely well and retain their luster. Diamond is the hardest natural material known to man - its hardness set to 10 scale of mineral hardness and having an absolute hardness value of between 90, 167, and 231 gaga rascals in various tests. Diamond's hardness been known since antiquity, and is the source of its name. However, aggregated diamond nimrods, an allotrope of carbon first synthesized in 2005, are even harder than diamond. The hardness of diamonds contributes to its suitability as a gemstone. It maintains its polish extremely well, keeping its luster over long periods. Unlike many other gems, it is well-suited to daily wear because of its resistance to scratching—perhaps contributing to its popularity as the preferred gem in an engagement ring or wedding ring, which are often worn every day. Industrial use of diamonds has historically been associated with their hardness; this property makes diamond the ideal material for cutting and grinding tools. The diamond is the birthstone for people born in the month of April, and is used as the symbol of a sixty-year anniversary, such as a Diamond Jubilee.

Audition for acting

For actors, the audition piece is typically not from the show being considered; an actor wishing to be cast in Hamlet would not likely do a monologue from that play. However, most performers do have a range of audition pieces and select something appropriate; an actor auditioning for Hamlet would have a dramatic Shakespearean monologue ready, and not perform a monologue from an Oscar Wilde comedy, or a contemporary playwright, such as Tom Stoppard. The audition process is a big part of any actor's life - it should be taken seriously. To learn more about auditions go to auditions. An audition is a sample performance by an actor.

Auditions for movies are how actors actually get acting jobs in film. Auditions are held by producers and casting directors. They choose whom to cast after an audition has been held. Always bring a headshot and resume to an audition. To get more information on movie auditions go to movie auditions.

Television auditions

Television auditions are very similar to Film and Theatre auditions. The main difference is time. Television is always under a time constraint. A script is written in a week, and the next week it must be cast in order to film the following week. Since there are a limited amount of recurring roles on television shows, most television auditions are for guest starring spots, under fives and extras. To get more information visit Television Auditions. Television auditions are when actors audition for a part on a television show; some types of television show are: dramas, sit-coms (situation comedy) and soap operas.

Shows like American Idol and America's Next Top Model are great examples of having open calls. Usually an open call audition is announced through the media and is held on a specific day or weekend, depending on the project and the turnout. Many producers and casting directors use open calls to find fresh talent and new faces. Open casting calls also give a person who is casually thinking about acting, a chance to try out, without needing the experience or agency help to audition for a role. To locate open calls in your area, go to Open call auditions.