Our story

About Petit Tresor

Petit Tresor begins with a simple idea: finding something small can make your day feel bigger. Inspired by rockhounding and the Great Lakes, we’re building a mystery treasure business around genuine stones, fossils, and gemstones.

Small beginnings, real curiosity

Our starting vision is a small northern Michigan launch, testing the idea with one attractive, vintage-style self-service machine before expanding. We’re taking it one discovery at a time; machine locations and availability will be shared when confirmed.

The surprise is part of the experience

Mystery packages are about the pleasure of an unexpected natural find. Exact contents vary by package. Special prizes, when offered, are an extra surprise—not a guaranteed reward. Always check the product listing for current contents information and pricing.

A little treasure to keep

Whether you’re starting a collection, choosing a gift, or sharing an unboxing, we hope your find inspires a closer look at the natural world. Browse our treasures for current availability, and visit our FAQ and policies before ordering.