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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.
2.15-Carat Rich Teal Blue Montana Sapphire (Heated) 
1.70-Carat Deep Blue-Green and Yellow Particolored Montana Sapphire (Heated) 
0.99-Carat Sky Blue Montana Sapphire (Heated) 
1.09-Carat Medium Blue Montana Sapphire (Heated) 
1.58-Carat Near Colorless Montana Sapphire 
3.10-Carat Bluish Violet to Purple Color-Change Sapphire 
1.24-Carat Teal Blue Montana Sapphire (Heated) 
The "Alexandra" Ring Set with 1.17-Carat Vintage Diamond 
1.13-Carat Sky Blue Sapphire 
2.92-Carat California Bicolored Tourmaline 
0.99-Carat Purplish Pink Montana Sapphire 
0.75-Carat Violet Umba Sapphire 
2.18-Carat Violet to Purple Color Change Ceylon Sapphire 
2.37-Carat Deep Royal Blue Ceylon Sapphire (Heated) 
0.81-Carat Teal Blue Montana Sapphire (Heated) 
1.43-Carat Teal Blue Montana Sapphire (Heated) 
3.25-Carat Greenish Gold California Tourmaline 
0.85-Carat Sky Blue Montana Sapphire 
3.06-Carat Midnight Blue-Teal Particolored Australian Sapphire 
1.96-Carat Royal Blue Ceylon Sapphire (Heated) 
1.34-Carat Pink Tourmaline 
1.36-Carat Teal Blue Montana Sapphire (Heated) 
0.50-Carat Pink Montana Sapphire (Heated) 
1.71-Carat Bubblegum Pink Pastel Pyrope Garnet 
1.99-Carat Purple Umba Sapphire 
1.02-Carat Gray-Aqua Montana Sapphire 
1.05-Carat Pale Aqua-Gray Montana Sapphire 
2.87-Carat Pink Tourmaline 
0.81-Carat Medium Blue Montana Sapphire (Heated) 
1.55-Carat Deep Violet-Blue Ceylon Sapphire 
1.27-Carat Medium Blue Montana Sapphire (Heated) 
1.01-Carat Orangey-Pink Umba Sapphire 
3.22-Carat Light Violet-Blue Montana Sapphire 
2.33-Carat Peacock Blue Montana Sapphire (Heated) 
0.81-Carat Violet-Blue Montana Sapphire (Heated) 
2.54-Carat Royal Blue Ceylon Sapphire (Heated) 
2.08-Carat Medium Blue Tanzanite 
1.62-Carat Near Colorless Montana Sapphire 
0.81-Carat Lemon Yellow Montana Sapphire 
0.68-Carat Medium Sky Blue Montana Sapphire (Heated) 
1.08-Carat Deep Blue-Green Montana Sapphire (Heated)