Rhyolite Spheres


Rhyolite Spheres in 4 sizes:

Extra Small: 20mm marble, $4.50;

Small: 25mm sphere $9.00;

Large: 40mm sphere, $18.00;

Extra Large: 50mm sphere, $29.00

Photo is sample.

Need a stand? We have several varieties to choose from here.




Rhyolite is a relatively rare volcanic rock with the same mineral makeup as granite. While it most commonly occurs with obsidian, rhyolite also serves as the parent rock for the formation of Oregon Opal. Because rhyolitic lava is so thick, it seldom makes it to Earth’s surface, but when it does, it piles over volcanic vents without flowing away, forming a dome. Such a dome is currently forming within the crater of Mount St. Helens in SW Washington. Metaphysically, rhyolite is said to represent change, creativity, and progress.

Additional information

Weight N/A

Extra Large, Extra Small, Large, Small


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