I have an intriguing story to share with you about the magnificent Crystal Cavern located in California.

Grizzly Ridge Quartz Ranch is a privately owned organization that focuses on exploring and developing an exceptional quartz cavern system situated in El Dorado County, California. The crystal cavern system is located in the Melones Fault zone, at the heart of California's Mother Lode region, between the Calaveras Terrane and the Shoo Fly Complex.

There is ample documentation of the scientific theories about the California Mother Lode region. As the continents were taking shape, the North American Plate rose while the Pacific Plate descended below it. Geologists have noticed that the ultra-basic rocks that have entered the Melones fault zone had a deep origin, originating from the upper mantle of the Earth. Before becoming a fault zone, the region used to be a deep ocean trench called the Sierran Trench. This underwater canyon stretched from northwest to southeast and extended far to the west. It originated in a prehistoric sea. The cracking of terranes led to the emergence of highly pressurized, super-saturated silicate solutions due to massive geologic events. Quartz crystals were formed in cavernous spaces as the silicate solutions cooled down. Scientists have extensively discussed how the cooling speed of quartz crystals affects their shape, size, and mineral inclusions.


These specimens are of Heirloom quality and come with detailed provenance. They are available for private enjoyment or donation placement. The price can be requested.


V Twin

 This natural twin crystal was carefully removed from the fault-line crystal cavern.   Translucent to transparent,  glows beautifully in the sunlight.  The original crystals that make up this specimen were perhaps longer, sheared by activity in the fault zone and re-healed with later-stage solutions.  Measures 28" long by 20" high by 15" wide.  A truly unique specimen from this Historic Site.

One Hundred Two pounds

 This high grade 102 pound quartz crystal is exquisite.  Sheared and re-healed during fault-line activity.

Displayed by twirling on a cloth rope.  This stone will look great displayed in natural light.

Dimensions = 23" x 12" x 10"


Companion Stones

As they were found in the lateritic clay. Complete stones.

Are these the tips of two different crystals split in half during a geological event or one crystal that was split and shifted by super hot solutions?


Giant Quartz
Giant Quartz
Giant Quartz