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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.
1.87-Carat Medium Blue Montana Sapphire (Heated) 
1.12-Carat Robin's Egg Blue Montana Sapphire 
1.34-Carat Gold-Yellow Particolored Montana Sapphire (Heated) 
1.01-Carat Light Blue Umba Sapphire 
1.46-Carat Rich Blue-Pale Orange Bicolored Montana Sapphire (Heated) 
1.27-Carat Orange-Blue Particolored Montana Sapphire (Heated) 
2.08-Carat Medium Blue Montana Sapphire (Heated) 
0.94-Carat Medium Blue Montana Sapphire (Heated) 
1.05-Carat Light Gray-Blue Montana Sapphire 
0.85-Carat Medium Blue Montana Sapphire (Heated) 
1.54-Carat Rich Teal-Green Particolored Australian Sapphire 
0.79-Carat Sky Blue Umba Sapphire 
4.94-Carat Teal-Purple-Green Particolored Unheated Tanzanite (Zoisite) 
0.73-Carat Robin's Egg Blue Montana Sapphire 
1.27-Carat Medium-Sky Blue Particolored Montana Sapphire (Heated) 
0.87-Carat Medium Blue Montana Sapphire 
1.01-Carat Medium Blue Montana Sapphire (Heated) 
0.94-Carat Yellow-Colorless Particolored Montana Sapphire (Heated) 
1.45-Carat Gold-Aqua Particolored Montana Sapphire (Heated) 
2.34-Carat Pale Gray-Lavender to Pink-Purple Color Change Umba Sapphire 
2.21-Carat Teal Blue Ceylon Sapphire (Heated) 
0.75-Carat Medium Blue Montana Sapphire (Heated) 
0.68-Carat Lilac Purple Umba Sapphire 
1.90-Carat Teal Blue Montana Sapphire (Heated) 
1.25-Carat Medium Blue Montana Sapphire (Heated) 
0.82-Carat Pale Lavender-Pink Montana Sapphire 
0.84-Carat Near Colorless Montana Sapphire (Heated) 
0.69-Carat Aqua Blue Montana Sapphire 
1.24-Carat Teal Blue Montana Sapphire (Heated) 
1.37-Carat Medium Blue Montana Sapphire (Heated) 
1.17-Carat Peacock Blue Montana Sapphire (Heated) 
1.08-Carat Teal Blue Montana Sapphire (Heated) 
0.80-Carat Pale Kiwi Green Grossular Garnet 
1.75-Carat Aqua Blue Montana Sapphire (Heated) 
1.68-Carat Teal Blue Sapphire 
0.97-Carat Robin's Egg Blue Montana Sapphire (Heated) 
1.45-Carat Light Aqua Blue Montana Sapphire (Heated) 
1.46-Carat Medium Blue Montana Sapphire (Heated) 
1.06-Carat Teal Blue Montana Sapphire 
1.02-Carat Blue-Green Montana Sapphire (Heated) 
0.67-Carat Near Colorless Montana Sapphire 
0.62-Carat Pale Yellow Montana Sapphire (Heated) 
1.34-Carat Deep Raspberry Red California Tourmaline 
1.33-Carat Teal Blue Montana Sapphire (Heated) 
1.47-Carat Aqua Blue Montana Sapphire (Heated) 
1.29-Carat Lavender-Gray Montana Sapphire