In this ongoing series, we are sharing advice, tips and insights from real entrepreneurs who are out there doing business battle on a daily basis. (Answers have been edited and condensed for clarity.)

Who are you and what’s your business?

My name is Ben de Kalo, and I am the founder and CEO of Worthy, a marketplace for pre-owned jewelry.

What inspired you to create Worthy?

When a person wants to sell their pre-owned jewelry, it is typically very difficult. Local jewelry stores or pawn shops usually lowball you, and eBay has trust issues for buyers, so people end up putting their jewelry in a drawer or in a bank vault. There is approximately $1 trillion worth of diamonds sitting in drawers across the country. Our households are, by far, the largest diamond mine in the world.