Moss Agate Star

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Material: Moss Agate

Weiht: 20-30g

10% of profits are used to protect nature and endangered animals

How Moss Agates Are Formed

Moss agates are a semiprecious stone, and are formed when silica deposits form within or on top of layers of rhyolite. Rhyolite is an igneous rock that is rich in silica. The silica deposits form within the rock over time, and as they do they take on a moss-like appearance.

Moss agates can be found all over the world, but some of the most notable deposits are in Brazil, India, and the United States. In the U.S., moss agates can be found in Montana, Wyoming, and Nebraska.

The Process of Formation

Moss agates take millions of years to form. The first step in their formation is the creation of rhyolite. Rhyolite is formed when lava cools very quickly. This quick cooling prevents large crystals from forming, which gives rhyolite its characteristic glassy appearance.


Once the rhyolite has cooled, it becomes susceptible to weathering and erosion. Over time, water seeps into cracks in the rock and carries with it dissolved silica. This silica then begins to deposit itself within the cracks in the rhyolite.


As more and more silica is deposited, it begins to take on a moss-like appearance. The final product is a beautiful semiprecious stone that is prized by collectors and jewelers alike.


Moss agates are truly a sight to behold. They are formed over millions of years through a process of deposition and erosion. If you ever have the chance to see one up close, you'll be able to appreciate all of the hard work that went into its formation!

Every day, we see nature deteriorating at an alarming rate. The climate is changing faster than ever before, with serious consequences for all life on Earth – including us! Wanting to help, we created Roe Garden to help conserve and restore biodiversity, the web of life that supports all on Earth. By donating 10% of our profits to WWF, we’re able to make a real difference in the fight against climate change and its effects on our planet. What we didn’t know was just how much our little garden would grow. But we’re not giving up without a fight. With your help, we can make a difference!

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