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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.
1.05-Carat Medium Blue Montana Sapphire (Heated) 
0.87-Carat Pale Violet-Blue Montana Sapphire 
1.15-Carat Peacock Blue Montana Sapphire (Heated) 
0.79-Carat Medium Blue Montana Sapphire (Heated) 
1.03-Carat Rich Sky Blue Montana Sapphire (Heated) 
0.76-Carat Medium Blue Montana Sapphire (Heated) 
1.78-Carat Greenish-Yellow Mali Garnet 
1.35-Carat Rich Blue-Yellow Particolored Montana Sapphire (Heated) 
2.42-Carat Deep Peacock Blue Montana Sapphire (Heated) 
1.45-Carat Colorless-Yellow Particolored Montana Sapphire (Heated) 
1.25-Carat Peacock Blue Montana Sapphire (Heated) 
1.07-Carat Lilac Purple Madagascar Sapphire 
0.92-Carat Colorless Montana Sapphire 
1.33-Carat Light Sky Blue Montana Sapphire (Heated) 
1.02-Carat Rich Sky Blue Montana Sapphire (Heated) 
1.44-Carat Blue-Yellow Particolored Montana Sapphire (Heated) 
1.08-Carat Gray to Purple Color Change Montana Sapphire (Heated) 
1.46-Carat Golden Yellow Montana Sapphire (Heated) 
0.84-Carat Pale Yellow-Green Montana Sapphire (Heated) 
The “Felicia" with 1.12-Carat Montana Sapphire (Heated) 
2.07-Carat Steely Blue Umba Sapphire 
0.67-Carat Pale Blue Montana Sapphire 
1.15-Carat Colorless Montana Sapphire 
2.09-Carat Colorless-Yellow Particolored Sapphire 
1.51-Carat Rich Blue-Orange Particolored Montana Sapphire (Heated) 
0.87-Carat Sky Blue Montana Sapphire (Heated) 
0.94-Carat Deep Blue Montana Sapphire (Heated) 
0.86-Carat Teal Blue Montana Sapphire (Heated) 
0.82-Carat Yellow-Green Particolored Australian Sapphire (Heated) 
0.82-Carat Near Colorless Montana Sapphire (Heated) 
2.16-Carat Unheated Tanzanite (Zoisite) 
0.63-Carat Near Colorless Montana Sapphire 
1.44-Carat Sky Blue Montana Sapphire (Heated) 
1.06-Carat Spruce Green Montana Sapphire 
1.96-Carat Magenta Purple to Intense Pink Color Change Mahenge Garnet 
1.22-Carat Pale Pink Montana Sapphire 
1.27-Carat Rich Blue Montana Sapphire (Heated) 
1.09-Carat Medium Blue Montana Sapphire (Heated) 
1.08-Carat Violet-Blue Ceylon Sapphire 
1.05-Carat Blue-Yellow Particolored Montana Sapphire (Heated) 
0.82-Carat Near Colorless Montana Sapphire 
0.80-Carat Teal Blue Montana Sapphire (Heated) 
0.79-Carat Pale Sky Blue Montana Sapphire (Heated) 
1.40-Carat Light Aqua Montana Sapphire 
2.60-Carat Light Violet Ceylon Sapphire 
Montana Sapphire Halo Earrings- Peacock Blue, 6.0mm (Heated) 
1.24-Carat Teal Blue Montana Sapphire (Heated) 
1.12-Carat Teal Blue Montana Sapphire (Heated) 
0.99-Carat Rich Blue Montana Sapphire (Heated) 
1.33-Carat Aqua Montana Sapphire (Heated) 
2.20-Carat Dark Blue-Green Australian Sapphire 
0.54-Carat Teal Blue Montana Sapphire (Heated) 
0.89-Carat Bright Green Colombian Emerald (Oiled) 
0.88-Carat Pale Blue Montana Sapphire (Heated) 
2.00-Carat Teal-Blue Particolored Montana Sapphire (Heated) 
1.50-Carat Medium Blue Montana Sapphire (Heated) 
0.80-Carat Sky Blue Montana Sapphire 
1.24-Carat Medium Blue Montana Sapphire (Heated) 
1.52-Carat Violet-Blue Ceylon Sapphire 
1.02-Carat Peacock Blue Montana Sapphire (Heated) 
1.11-Carat Medium Blue Montana Sapphire (Heated) 
The "Grace" Ring with 1.40-Carat Tourmaline 
0.70-Carat Colorless Montana Sapphire (Heated) 
0.81-Carat Colorless Umba Sapphire 
1.34-Carat Yellow-Green Australian Sapphire