Bryan Sobolewski was a diamond thief and committed a string of armed robberies and break-ins around New England in the early '90s. Sobolewski speaks with Insider about the reconnaissance and casing aspects of jewel theft and how he would approach stores. He recounts how his family broke into safes, smashed cabinets, and stole from traveling salesmen. He talks about scams within the diamond industry and how he believes gem stores are complicit. He covers the scarcity and value of diamonds and uncut gems, and he describes how thieves value sets and engravings. Since leaving prison, Sobolewski gained a bachelor's degree in psychology. He has spoken in schools and substance-abuse-counseling groups. He now is a personal trainer and lives in Texas. He is the author of "Family Jewels," and in 2021, he started "Family Jewels Podcast," which details his life story.