Rare Glowing Rainbow Stones Found 44 Miles South of Twin Falls, Idaho, Near Nevada Border
Rockhounding Season Arrives in Southern Idaho’s Volcanic Desert
It is rockhounding season once again in southern Idaho, and one of the most visually striking gemstones in the region is drawing renewed attention from collectors and outdoor enthusiasts alike. A stretch of desert approximately 44 miles south of Twin Falls, Idaho, off Highway 93 near the Nevada border, is known to contain deposits of chalcedony — a rare, multi-colored stone that glows under certain lighting conditions and can fetch strong prices among collectors when found in flawless condition.
Late April is considered an ideal time to venture into the desert landscape of Twin Falls County and the surrounding region in search of rare stones. Southern Idaho’s abundance of gemstones is largely attributed to the area’s extensive volcanic history, which created conditions favorable for the formation of a wide variety of minerals across the state’s central and southern terrain.
What Makes Chalcedony Unique — and Valuable
Chalcedony stands apart from other stones found across the Magic Valley region for several reasons. The stone appears in a range of colors including pink, blue, and green, and is composed primarily of silica and water, according to Rock Chasing, a rockhounding resource. Most notably, chalcedony possesses fluorescent qualities that cause it to glow when exposed to certain types of light — a characteristic that makes it a highly sought-after collector’s piece in the Gem State and beyond.
The more flawless a specimen, the higher the demand and market value it commands. Polished examples of the stone are considered premium finds among rockhounding enthusiasts across the Pacific Northwest and intermountain West.
The specific area drawing attention is Rabbit Spring, a region situated between Contact, Nevada, and Twin Falls. Multiple pulloffs along the highway allow visitors to park safely on public land and search for the stone on foot. The accessibility of the site makes it a practical destination for families and hobbyists who want to explore the natural resources of the region without specialized equipment or permits.
A Tradition Rooted in Idaho’s Gem State Identity
Idaho has long carried the nickname the “Gem State,” and for good reason. Dozens of different gemstone varieties are scattered throughout the state, with southern Idaho’s volcanic geology making it particularly rich ground for amateur and experienced rockhounds alike. Opals, agates, jasper, and now chalcedony continue to draw visitors to public lands throughout the region each spring and summer.
For residents of Twin Falls, Buhl, Filer, Kimberly, and surrounding communities, the chalcedony deposits along Highway 93 offer a nearby and rewarding outdoor pursuit as warmer months arrive. The site’s location on publicly accessible land means no special access arrangements are required, making it an approachable adventure for locals looking to explore the landscape just south of the Snake River Canyon.
Outdoor recreation and natural resource exploration remain important parts of life in Twin Falls County, where residents have long valued access to Idaho’s public lands and the opportunities they provide. As spring takes hold across the Magic Valley — even as freeze warnings have recently reminded residents that early-season conditions can be unpredictable — the desert south of Twin Falls is beginning to draw rockhounding enthusiasts eager to begin the season’s search.
Whether you are a seasoned collector or simply looking for a family-friendly day trip with an outdoor twist, the chalcedony fields near the Nevada border offer a genuine taste of what makes southern Idaho’s landscape so distinct.
What Comes Next
Rockhounding activity along southern Idaho’s public lands is expected to increase through late spring and into summer as weather improves across Twin Falls County. Those planning a trip to the Rabbit Spring area are encouraged to research current road and land access conditions before heading out and to follow all public land use guidelines. For more statewide coverage of Idaho’s outdoor recreation and natural resources, visit Idaho News.