This is the type locality for both borates, meyerhofferite and inyoite. It consists of a cluster of prismatic inyoite crystals converted to meyerhofferite. It is uncommon to find this species with crystals of such size. A piece of genuine interest for collectors keen on chemical and systematic mineralogy.
It formerly belonged to the collection of our good friend Jaroslav Hyršl, one of today's leading authorities in mineralogy.