Classic Diamond Round Brilliant
Showing 73–96 of 608 results
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.
1.35-Carat Pale Lilac Umba Sapphire 
0.97-Carat Rich Blue Montana Sapphire (Heated) 
1.08-Carat Nasarawa Teal Aqua 
1.08-Carat Greenish-Yellow Mali Garnet 
0.80-Carat Violet-Blue Montana Sapphire (Heated) 
0.73-Carat Pale Lavender Montana Sapphire 
0.71-Carat Pale Lavender Montana Sapphire (Heated) 
Montana Sapphire Halo Earrings- Peacock Blue, 6.0mm (Heated) 
1.42-Carat Midnight Blue Australian Sapphire (Heated) 
1.05-Carat Blue-Yellow Parti-Colored Montana Sapphire (Heated) 
0.99-Carat Purplish Pink Montana Sapphire 
1.14-Carat Peacock Blue Montana Sapphire (Heated)