Mined from: Alder, Montana

Description: This natural corundum placer specimen comes from the historic gem-bearing gravels of Alder, Montana—an area long celebrated for its sapphires and other alluvial treasures. These water-worn corundum fragments were naturally tumbled by ancient stream systems, giving them a slight rounded appearance that reflects their journey through time. Composed of aluminum oxide, corundum ranks 9 on the Mohs hardness scale, making it one of the hardest minerals on Earth.

What sets this piece apart is its UV reactivity—under ultraviolet light, it fluoresces, revealing hidden colors and structures that add intrigue for both collectors and educators. This makes it a fantastic specimen not only for its geological significance but also for display and hands-on learning.

Whether you're a gem enthusiast, mineral collector, or geology hobbyist, this Montana corundum offers a fascinating look at one of Earth's most durable and visually captivating minerals.

Chemical Composition: AlO

Chakra: Root Chakra, Heart Chakra

Small
Approximate Size of 1 Piece: 12mm x 10mm x 9mm
Approximate Weight of 1 Piece: 2g

Medium
Approximate Size of 1 Piece: 20mm x 15mm x 10mm
Approximate Weight of 1 Piece: 8g

Large
Approximate Size of 1 Piece: 20mm x 20mm x 15mm
Approximate Weight of 1 Piece: 16g

Quantity: 1pc

We do our best to buy quality products- although not every rock is the same. If you choose to purchase the "staff pick option", we will select the best of the batch for you. Otherwise, it will be at random from the larger batch we have in stock.