100% Natural untreated unheated Helena, Montana Sapphires.  
Extreme beauty and extreme hardness and durability for all jewelry purposes. Those stones hold value, pick up these bright little stars up here while they last. The ask is $500 per ct.  Average sizes as per images are round brilliants and .40 cts.  
 
Some info gathered via the internet 
Montana’s different types of sapphire deposits:
Primary Sapphire Deposit – As Montana’s only primary sapphire deposit, Yogo Gulch is where you’ll find the finest and most prized sapphires.
Secondary Sapphire Deposits – These may play second fiddle but are equally significant in the gemstone world. While Yogo Gulch reigns supreme, secondary deposits near Philipsburg (Rock Creek), Deer Lodge (Dry Cottonwood Creek), and Helena (Missouri River) offer their quality sapphires.Eldorado Bar on the Missouri River – It’s the largest and best-known of the Missouri River deposits, boasting a 14-mile-long (22.5 km) stretch that once yielded sapphires. Other historically mined spots like American Bar, Dana Bar, and Spokane Bar are like their glitzy next-door neighbors.Rock Creek – Or as it’s popularly known, Gem Mountain, is the most important of these locations, sporting a rich history and, well, copious amounts of sapphire.If you plan on sapphire hunting in these gemstone sources. 
On a scale of hardiness, Montana sapphires are no pushovers either. 
 
Rated at a robust 9 on the Mohs scale — where diamond reigns at 10 — these gem-quality sapphires aren’t easy to scratch. This makes them not just beautiful but also incredibly durable, suitable for a variety of jewelry uses, from rings to necklaces.
So, when you’re contemplating adorning yourself with Montana sapphires, you’re not just choosing a stunning piece, but also a gem with a distinct backstory and physical identity. 
 
 the beauty and durability of these sapphires became known, they started appearing more and more in stunning jewelry designs, including:
Engagement Rings – Montana sapphires, known for their exceptional hardness, are gaining popularity as an alternative to diamond engagement rings. Their enduring allure makes them a symbolic choice for engagement rings.
Necklaces – Often adorned with a single stunning sapphire pendant or as part of a multi-stone statement, Montana sapphire necklaces are versatile and chic.
Earrings – From subtle studs to cascading chandelier designs, sapphire earrings offer a unique pop of color for every occasion.
Bracelets – Whether as a standalone piece or part of a set, sapphire bracelets are a charming way to add a touch of Montana’s natural beauty to your ensemble.
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Contact me if yoou have questions. JHIATT