A hallmark is an official mark or series of marks struck on items made of precious metals — platinum, gold, silver and in some nations, palladium. In a more general sense, the term hallmark can also be used to refer to any distinguishing characteristic or trait.

Historically, hallmarks were applied by a trusted party: the 'guardians of the craft' or nowadays by an assay office. Hallmarks are a guarantee of certain purity or fineness of the metal as determined by formal metal (assay) testing.

24 karat gold is as close as you can get to pure gold; due to chemical impurities, there is no such thing as "100% pure gold".

Hallmarks are often confused with "trademarks" or "maker's mark". Hallmarks are not the mark of a manufacturer to distinguish his products from other manufacturers’ products, which is the function of trademarks or makers' marks. To be a true hallmark, it must be the guarantee of an independent body or authority that the contents are as marked. Thus, a stamp of '925' by itself is not, strictly speaking, a hallmark, but is rather an unattested fineness mark.

Chelah Horsdal (born June 19, 1973) is a Canadian actress and model.

She grew up in the Kitsilano neighbourhood of Vancouver with her mother, Lindsay. Her father is the folk singer Valdy. Horsdal first appeared as a model in local television commercials.

She moved to the Caribbean and returned to Canada in 2002 where she then began her acting career. Horsdal has since appeared in over 75 commercials, multiple films and TV series. She recently^[when?] wrapped lead & supporting roles on "Three Weeks, Three Kids" "On Strike For Christmas," "Marley & Me; The Puppy Years." & Lifetime's The Client List, co-starring Jennifer Love Hewitt & Cybil Sheppard, Plus back-to-back lead roles in Lying To Be Perfect and Mrs. Miracle. Additional credits include leads on the feature Burning Mussolini, Nickelodeon's Gym Teacher: The Movie, co-starring Christopher Meloni & Amy Sedaris, Flirting With Forty with Heather Locklear and the FOX TV pilot The Virgin of Akron, Ohio. Supporting leads include AVP2: Requiem for 20th Century Fox and Possession alongside Sarah Michelle Gellar, as well as Elegy with Ben Kingsley & Penélope Cruz and Rise of the Planet of the Apes with John Lithgow & James Franco. Her performances in the short films Dark Room (2006) and "The Hostage" (2010) both earned Leo nominations for Best Performance. Recurring roles include the critically acclaimed Battlestar Galactica, Exes & Ohs, The L Word, Stargate: SG1, Saved, DaVinci's Inquest, Whistler, Blackstone, and, most recently, "Clue."

Lori Anne Loughlin (born July 28, 1964) is an American actress. She best known for her role as Rebecca Donaldson-Katsopolis on the ABC sitcom Full House (1988–1995). From 2008 to 2011, she portrayed the role of Debbie Wilson on the The CW series 90210, a spin-off of Beverly Hills, 90210. She is also known for portraying the role of Ava Gregory on the The WB series Summerland (2004–2005), which she also co-created and produced.

Loughlin was born in Queens, New York and moved with her family to Long Island. She lived in Oceanside, New York, where she attended Oaks Public Elementary School #3 and then moved to Hauppauge, New York, where she attended Hauppauge High School. She is of Irish descent.

She began her career at age twelve as a print model. During her early teen years she appeared in television commercials and was frequently seen in national print advertisements.

At the age of fifteen, Loughlin was cast in the ABC soap opera The Edge of Night, playing the part of Jody Travis, an aspiring dancer, appearing in the series from 1980 to 1983. From 1983 to 1988, Loughlin appeared a number of feature films and television guest spots. From 1988 to 1995, she was cast in her most notable role to date, as Rebecca Donaldson, Danny Tanner (Bob Saget)'s co-host and later Jesse Katsopolis (John Stamos)' wife in the ABC sitcom Full House. Recurring during the second season, she became a regular for the remainder of the series run.