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Shane Company or Shane Co. is the largest privately owned jeweler in the United States. The company is a direct diamond, ruby, and sapphire importer that operates twenty retail stores across the United States and their website ShaneCo.com. The company was founded in 1971, and is based in Centennial, Colorado.
The company promotes their retail locations and website through radio commercials that prominently feature the company’s founder, and CEO, Tom Shane and the tagline "Now you have a friend in the diamond business."
Tom Shane graduated from the University of Colorado in 1970 with a degree in business administration. In 1971 he founded modern-day Shane Company, although his family has been in the jewelry business since The Great Depression. His grandfather, Charles Shane, launched the family into the jewelry business in 1929 when he purchased his first jewelry store in Cleveland, OH. Richard Shane, Tom Shane's father, joined his father and brother, Claude Shane, in the business after World War II. Several years afterward, Richard and Claude split their business interests into two large jewelry chains in the Midwest, opening the first stores with the name Shane Company. Throughout the following decades, Tom Shane grew Shane Co. from a one-store-operation into a jewelry store chain with twenty locations in thirteen states.
On August 11, 2010, Shane Co. filed a Plan of Reorganization  to repay 100% of all debts, placing debts to Tom Shane as the lowest priority. The bankruptcy judge called it "the ideal Chapter 11". On December 21, 2010, Shane Co. emerged from Chapter 11 bankruptcy protection.
References in popular culture 
Tom Shane was depicted in an episode of South Park. The episode titled, “Guitar Queer-o” originally aired on November 7, 2007. He was portrayed at a party among notable local Colorado celebrities such as Jake Jabs from American Furniture Warehouse, and Jay Cutler, the former quarterback of the Denver Broncos.
Shane Co. is known for their radio advertisements. A typical radio advertisement will contain a marketing message and the often quoted culmination of the spot, the company’s tagline, “Now you have a friend in the diamond business.”
The company has aggressively defended the tagline. The tagline and Tom Shane's delivery has been the subject of humor; the Atlanta Business Chronicle noted "the ads have all the flash and flare of a public service announcement", remarking on his "relentlessly earnest tone". The San Francisco Chronicle remarked "for the past 35 years, Shane has bored radio listeners with his earnest, monotone delivery".
The company states the radio advertisements are the longest-running continuous campaign in the history of the medium of radio. The commercials were freshened up with the help of the Grey Global Group advertising agency, who used the tagline "He might be dull, but he's brilliant" in 2006. The commercials remain a cornerstone of the company's advertising efforts to this day.
On July, 30, 2010 the production team known as TheGreenRiceBrady uploaded a music video to YouTube called “Colorado Girls." The song is a parody of the popular song “California Gurls,” by Katy Perry, it pays homage to many Colorado landmarks, and features of the region. The lyric “Tom Shane on the radio,” quickly followed by the company’s tagline, “Now you have a friend in the diamond business,” can be heard in the song at the 1:35 mark.
- Barry, Tom (2002-02-18). "Tom Shane understands the importance of being earnest".
- The Denver Post, "Shane Co. Seeks Bankruptcy Protection," 12 Jan 2009
- Davis, Joyzelle (2009-01-12). "Shane Co. files for Chapter 11 after dismal holiday season". Rocky Mountain News (Denver, Colorado). Retrieved 2009-04-02.
- "Shane Co. closes three stores". National Jeweler. 2009-04-01. Retrieved 2009-04-02.
- Shane Co. Files Plan to Exit Chapter 11
- Shane Co. Emerges from Chapter 11
- Husted, Bill (11 November 2007). ""South Park" drops names, takes jabs". The Denver Post. Retrieved 28 May 2011.
- McGaw, Renee (17 April 2008). "Shane sues California jeweler over slogan". Denver Business Journal. Retrieved 28 May 2011.
- Barry, Todd (18 February 2002). "Tom Shane understands the importance of being earnest". Atlanta Business Chronicle. Retrieved 28 May 2011.
- Saracevic, Alan (22 January 2006). "Our friend in the diamond business dull no more?". San Francisco Chronicle. Retrieved 28 May 2011.