Diamonds are a girl's best friend—unless you're Ingrid Lederhaas-Okun.

Yesterday prosecutors arrested Lederhaas-Okun, a former Tiffany & Co. vice president of product development, for stealing diamond, platinum and gold bracelets, earrings and pendants from her ex-employer and reselling them for $1.3 million. She's charged with wire fraud and interstate transportation of stolen property. 

According to a statement from U.S. Attorney Preet Bharara, Lederhaas-Okun had authority to check out jewelry from Tiffany to take to potential manufacturers so they could calculate production costs. According to the complaint, Lederhaas-Okun checked out 165 pieces of jewelry between January 2011 and February 2013 and resold them to an unnamed Manhattan jewelry reseller.

Tiffany let Lederhaas-Okun go in February when it downsized companywide. It was then that the famed jeweler discovered that she had checked out and not returned the jewelry.

“As alleged, Ingrid Lederhaas-Okun went from a vice president at a high-end jewelry company to jewel thief,” Bharara said in the statement. 

Lederhaas-Okun could face up to 30 years in prison for her crimes. 

Read Bloomberg and Reuters for more information.

For more InsideCounsel news about executives behaving badly, read:

Dolce and Gabbana convicted of tax evasion

Former Bristol-Myers exec admits guilt in insider trading case

Aeropostale executive convicted over kickback conspiracy with vendor

Jilted exec sues former partners over Fox Mobile deal

News Corp. executive editor charged with bribery