S P E C I A L I Z I N G I N

Montana Sapphires & Montana Yogo Sapphires

Montana’s most trusted sapphire source since 1982. Browse our curated selection of loose stones and finished jewelry.

Montana Yogo Sapphire Specialists

Natural & Ethically Sourced

Custom Designed Options Available

Handpicked Sapphires from the Heart of Montana

Stephen Isley Jewelry has served sapphire collectors and lovers since 1982, specializing in Montana Sapphires & Montana Yogo Sapphires

“We’ve worked with Stephen Isley Jewelry multiple times and they are fantastic. They go above and beyond to make sure you have all of the information you need to make an informed decision and are beyond patient and helpful. Tess in particular is wonderful to work with.”

Katie S.

The Montana Sapphire Journal

The Montana Sapphire Journal
Are Montana Sapphires Treated? What You Need to Know
Are Montana Sapphires Treated? What You Need to Know

Montana sapphires are beloved for their unique range of colors, ethical sourcing, and natural beauty—but many people wonder: Are Montana sapphires treated? And if so, what does that mean?

Let's break it down clearly so you can make confident, informed choices about these incredible American gemstones.

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🌿 Green Yogo Sapphires? Yes—very rarely. 💎⁣⁠ ⁠ Montana Yogo Sapphires are famous for their cornflower blue, but every once in a while, nature surprises us with a hint of green. Why does it happen? Is it natural? And are they more valuable? ⁠
🌿 Green Yogo Sapphires? Yes—very rarely. 💎⁣⁠ ⁠ Montana Yogo Sapphires are famous for their cornflower blue, but every once in a while, nature surprises us with a hint of green. Why does it happen? Is it natural? And are they more valuable? ⁠ ⁣⁠ Tap the link in our bio to read more ➡️ The Montana Sapphire Journal⁠ ⁣⁠ #yogosapphire #montanasapphires #raregems #greensapphire #ethicaljewelry #montanamined
"You must be bold, brave, and courageous and find a way to get in the way." ⁠ — John Lewis⁠ ⁠ This ring is a bold, eye-catching beauty ✨️⁠ ⁠ Featuring a Montana Sapphire and Diamond Ring in 14k White Gold⁠ ⁠ ✨️ Discounted to $3,537.50
"You must be bold, brave, and courageous and find a way to get in the way." ⁠ — John Lewis⁠ ⁠ This ring is a bold, eye-catching beauty ✨️⁠ ⁠ Featuring a Montana Sapphire and Diamond Ring in 14k White Gold⁠ ⁠ ✨️ Discounted to $3,537.50⁠ ⁠ #montanasapphire #boldjewelry #14kwhite #sapphireanddiamondring #johnlewis
“Jewelry is like the perfect spice — it always complements what’s already there.”⁠ – Diane Von Furstenberg⁠ ⁠ Featuring a 1.15ct Montana Sapphire Ring in 14k White Gold⁠ ⁠ 🏷️ Original Price: $3,750⁠ ✨️ Discounted to $1,
“Jewelry is like the perfect spice — it always complements what’s already there.”⁠ – Diane Von Furstenberg⁠ ⁠ Featuring a 1.15ct Montana Sapphire Ring in 14k White Gold⁠ ⁠ 🏷️ Original Price: $3,750⁠ ✨️ Discounted to $1,875