Meet Mike J. • Buying since 2011 • Built for privacy and clarity
About Diamond Buyer Co
Hi—I'm Mike J., and I run Diamond Buyer Co. I built this business so sellers can get a fair offer without feeling rushed. As a local diamond buyer, I keep things simple: clear communication, private appointments, and realistic pricing based on today’s market.
How I got started
My interest in jewelry started early. When I was a kid, I spent time helping in a family business and quickly gravitated to the jewelry side. First, I learned how to evaluate gold and silver, and then I began studying diamonds and watches. Later, I worked in retail jewelry for years, which taught me how pricing works behind the scenes.
Eventually, I wanted a different model—one that put the seller first. So, in 2011, I started buying directly from private sellers. At the time, the market was active and many people wanted a fast, trustworthy way to sell. Since then, I’ve continued to refine the experience and focus on a calm, one-on-one approach.
Why a private, appointment-only setup helps you
Large storefronts carry high overhead. Because of that, many sellers receive quick offers with limited explanation. In contrast, a private office lets me focus on one seller at a time. That means you get attention, not pressure.
What you can expect
- Fast photo estimates to set expectations before you drive anywhere
- Private appointments in Northbrook for discreet selling
- Clear explanations of what drives value (cut, color, clarity, carat, and brand)
- Prompt payment options once you accept an offer
Next step: If you want an estimate today, send photos and any paperwork. We usually reply quickly with a realistic range and an easy next move.
Selling from outside Illinois? We can help.
Although our office is in Northbrook, we work with sellers across the country. First, you send photos for an estimate. Then, if you want to move forward, we can discuss insured shipping. Once we receive the items, we confirm the details and provide an exact offer.
How insured shipping typically works
- We agree on the plan after the photo estimate.
- You package your items securely and ship with an insured label.
- We inspect and confirm details soon after delivery.
- You accept or decline the final offer. If you decline, we return the items promptly.
Finally, if you’d rather talk through the process, call me directly. I’ll answer questions and help you decide what’s best for your situation.
Built on trust and straightforward communication
Selling diamond jewelry is personal. Sometimes it’s an estate item, and sometimes it’s a piece tied to a major life change. Because of that, I keep the experience calm and direct. You can also check reviews on platforms like Google, Yelp, BBB, and Facebook to see how other sellers describe the process.
What I buy most often
- Diamond engagement rings and wedding sets
- Loose diamonds with or without certificates
- Designer jewelry and signed pieces
- Antique and vintage diamond jewelry
- Diamond bracelets, necklaces, and earrings
- Luxury watches (including diamond watches)
Finally, I’m happy to meet across the North Shore and nearby areas when schedules allow. If you’re in Northbrook, Skokie, Chicago, Glenview, Wilmette, Winnetka, Highland Park, Deerfield, Buffalo Grove, Arlington Heights, Mount Prospect, Niles, reach out and we’ll plan the simplest option.