The Perfect Engagement Ring

Combine our in-house designs with unique, ethically sourced and eco-friendly gemstones!

A ring as unique as you.

Design your own custom jewelry

read what our customers are saying

The custom ring design process was so easy to go through. The ring turned out even more beautiful than we could have imagined. The way Jeff cuts their stones gives them more brilliance than you can find in most places. We've never seen a sapphire sparkle this much. We will likely be doing business with them again in the future. They did an amazing job all around!


- Tori

My husband and I were throwing around the idea of upgrading our rings for our 10 year anniversary. We're both very sentimental about the diamond that he proposed with so we decided to look for something new and unique. I'm a sucker for all things teal so I started researching and stumbled across Montana Sapphires. Glacier National Park is where we honeymooned and I love the connection to Montana. I am absolutely obsessed with the deep teal sapphire we chose and the setting. I can't take my eyes off of it. I get compliments on it everywhere we go. Thank you Lauryn for dealing with me being a total pain in the butt! You created the most beautiful ring I could have imagined!

- Susan

Thank you so much for making this experience easy and enjoyable. I appreciate all the work that went in to making the ring perfect and accommodating my requests. My fiancée loves it and it truly is gorgeous! Thank you for turning my ring buying experience around for me!


- Leah

Natural Gemstone Jewelry & Loose Gemstones at Earth’s Treasury

Welcome to Earth's Treasury!

If you’re looking for beautiful precision-cut loose gemstones or custom-designed natural gemstone jewelry, you’ve come to the right place. Earth’s Treasury features one of the widest selections of ethically sourced colored gemstones available online. We work closely with professional artisans who craft beautiful jewelry using gemstones that come directly from the mine to the market. Sapphires, rubies, emeralds, tourmalines, tanzanite, aquamarine—we have it all!

At Earth’s Treasury, we love the process of working with clients to help make their custom natural gemstone jewelry vision come to life. Whether you prefer a classically styled piece or a truly unique custom design, we can make it happen. We will work with you through the design, prototyping, casting, and production processes to craft your dream piece of jewelry.

While our collections contain colored gemstones from all over the world, our true passion is for North American gemstones. We work with American miners to source stones such as the brilliant Montana sapphire, gorgeous Oregon sunstone and colorful tourmaline from California and Maine. There is a remarkable diversity of colored gemstones available right here in America, many of which are rarer and more valuable than diamonds!

If you have any questions about our collection, don’t hesitate to reach out to us. We’re here to help you through the process of finding the perfect natural gemstone jewelry or loose gemstones online.

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