Umba, Tanzania
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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.
0.82-Carat Grayish Blue Montana Sapphire 
5.25-Carat Golden Orange Zircon 
1.76-Carat Aqua Blue Montana Sapphire 
0.85-Carat Steely Blue Umba Sapphire 
2.28-Carat Violet-Blue Umba Sapphire 
2.34-Carat Pale Gray-Lavender to Pink-Purple Color Change Umba Sapphire 
0.84-Carat Medium Blue Montana Sapphire (Heated) 
3.02-Carat Bubblegum Pink California Tourmaline 
1.13-Carat Deep Blue-Green Montana Sapphire (Heated) 
1.36-Carat Cornflower Blue Ceylon Sapphire 
1.61-Carat Rich Blue Montana Sapphire (Heated) 
1.11-Carat Teal Blue Montana Sapphire (Heated) 
0.99-Carat Medium Blue Montana Sapphire (Heated) 
0.64-Carat Bluish Violet Montana Sapphire 
1.69-Carat Purple Umba Sapphire 
1.53-Carat Deep Peacock Blue Montana Sapphire (Heated) 
1.82-Carat Cornflower Blue Ceylon Sapphire 
1.56-Carat Sky Blue Ceylon Sapphire 
1.22-Carat Pale Pink Montana Sapphire 
1.06-Carat Spruce Green Montana Sapphire 
1.07-Carat Teal Blue Montana Sapphire (Heated) 
1.64-Carat Pale Violet Umba Sapphire 
1.00-Carat Medium Blue Montana Sapphire (Heated) 
1.16-Carat Pale Aqua-Yellow Particolored Montana Sapphire (Heated) 
Accented Montana Sapphire Earrings- Cushion, 5.0mm (Heated) 
1.47-Carat Medium Blue Montana Sapphire (Heated) 
0.79-Carat Purple Montana Sapphire 
1.38-Carat Light Aqua Blue Montana Sapphire (Heated) 
2.18-Carat Aqua Blue Montana Sapphire (Heated) 
0.87-Carat Teal Blue Montana Sapphire (Heated) 
1.15-Carat Rich Blue Montana Sapphire (Heated) 
1.11-Carat Purple Madagascar Sapphire 
2.59-Carat Rich Teal Blue Montana Sapphire (Heated) 
2.17-Carat Yellow-Green Particolored Australian Sapphire 
0.62-Carat Greenish-Yellow Montana Sapphire 
1.10-Carat Medium Blue Montana Sapphire (Heated) 
1.11-Carat Sky Blue Montana Sapphire (Heated) 
2.26-Carat Magenta Pink Burmese Spinel 
0.86-Carat Midnight Blue-Gold Particolored Montana Sapphire (Heated) 
2.11-Carat Greenish Yellow California Tourmaline 
1.81-Carat Magenta-Red Umba Sapphire