Classic Diamond Round Brilliant
- You cannot add "0.98-Carat Deep Blue-Green Montana Sapphire (Heated)" to the cart because the product is out of stock.
Showing 1–24 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.
1.54-Carat Bright Green Colombian Emerald (Oiled) 
1.21-Carat Peacock Blue Montana Sapphire (Heated) 
1.12-Carat Purple-Pink California Tourmaline 
0.89-Carat Light Yellow Montana Sapphire (Heated) 
0.94-Carat Bright Pink Montana Sapphire 
1.94-Carat Rich Blue Montana Sapphire (Heated) 
0.59-Carat Yellow-Orange Particolored Montana Sapphire (Heated) 
2.04-Carat Bluish Violet Umba Sapphire 
1.45-Carat Light Aqua Blue Montana Sapphire (Heated) 
1.13-Carat Sky Blue Sapphire 
0.92-Carat Colorless Montana Sapphire 
1.26-Carat Violet-Blue Sapphire 
1.43-Carat Rich Blue Montana Sapphire (Heated) 
1.41-Carat Rich Purple Umba Sapphire 
1.17-Carat Green Australian Sapphire 
3.38-Carat Mint Green Grossular Garnet 
2.23-Carat Pale Yellow-Green Montana Sapphire (Heated) 
1.66-Carat Royal Blue to Purple Color Change Ceylon Sapphire 
1.41-Carat Violet Purple Ceylon Sapphire 
0.93-Carat Greenish-Yellow Montana Sapphire (Heated) 
0.87-Carat Bright Yellow Montana Sapphire 
1.28-Carat Peacock Blue Montana Sapphire (Heated) 
1.63-Carat Medium Blue Montana Sapphire (Heated) 
0.53-Carat Bright Green Colombian Emerald (Oiled) 
Custom Jewelry Affirm 
1.81-Carat Midnight Blue-Green Particolored Australian Sapphire 
0.87-Carat Aqua Blue Montana Sapphire (Heated) 
1.45-Carat Medium Blue Montana Sapphire (Heated) 
1.62-Carat Rich Spruce-Lime Green Particolored Australian Sapphire