Green Montana Sapphire Engagement Ring . This 2.135ct natural Green Montana Sapphire ring boasts an incredibly clean stone with a light hint of a yellow sun spot in the middle and set into 18k gold.

Today, some more common Montana sapphires can fetch $1000—$4000 a carat, ... In the late 19th century, Tiffany & Co. started using Montana sapphires in their jewelry designs.

Green Montana Sapphire Engagement Ring . This 2.135ct natural Green Montana Sapphire ring boasts an incredibly clean stone with a light hint of a yellow sun spot in the middle and set into 18k gold.

“The Montana sapphires that I’m drawn to usually show three colors,” Ms. Chelsea said, adding that Montana-sapphire rings from her line start at $1,500 and can cost as much as $8,500.

She and her husband, Stanley, have owned Yogo Sapphire Jewelry Co. at 1219 Central Ave. since 1985. After more then 30 years, the Gunthers are closing their doors.

Sapphire Gallery in Philipsburg, for example, has started selling bracelets made of all three kinds of Montana sapphires – precious stones from Missouri River, Rock Creek and Dry Cottonwood.

A sapphire engagement ring is one of the most classic choices you can make for a proposal. Timeless, regal and elegant, they are said to symbolise luck, loyalty and happiness and are thought to ...