What is it?

We use agatized dinosaur fossil for our dinosaur bone rings. Agatized dinosaur bone is a rare form of fossilized dinosaur bone where the original fossilized bone has been re-mineralized, or replaced, with silica-based compounds, such as agate, jasper, chalcedony, or opal. It can be traced back to dinosaurs that roamed the earth during the late Jurassic Age around 150 million years ago.

Where is it from?

Non-gem grade dinosaur bones can be found in many places all over the world. The highly agatized, uniquely patterned dinosaur bone used in our rings is found in the Four Corners region in the United States where Arizona, New Mexico, Utah and Colorado meet. The bulk of the dinosaur bone used in our rings were found in this area.

How is it formed?

Agatized dinosaur bone is a unique fossil where the original fossilized bone, typically permineralized with calcite, has been re-mineralized, or replaced, with silica-type compounds. This requires a particular type of environment, referred to as an aqueous intrusion, to replace the calcite in the original fossils with silicates. For an aqueous intrusion to occur, local strata layers must be uplifted during tertiary intrusions so that silica-rich, superheated groundwater can flood these layers and force water and aqueous solutions into the microporous fossilized bone. It is this rare process that transpired on the Colorado Plateau 35 million years ago that created the beautifully patterned agatized dinosaur bone now used in our rings.

Unique Characteristics

While we use fossils that are too small or broken to be used in museums as showpieces, dinosaur bone looks like a typical rock, coming in a variety of sizes, until it is cut and polished. The different colors and patterns in agatized dinosaur bone are caused by minerals such as chlorite, chromium, iron-oxide and manganese that enter the cells during fossil formation making each piece truly one-of-a-kind.

Technical Details

Dinosaur bone is a fossil, fossil is a rock, and rock is brittle. This is why we inlay the dinosaur bone as a crushed mosaic, rather than as an intact piece, ensuring a durable, wearable ring.

First, our master craftsmen crush the dinosaur bone into small pieces. Then, those pieces are inlaid into the groove of a band and sealed with a medical-grade resin. Lastly, the ring is sanded smooth and polished, giving it a final glossy appearance.

By the Numbers

Can be traced back to dinosaurs from the late Jurassic Age
Available in 3 colors: Tan, red and black

Found in the four corners of UT, AZ, NM and CO

Customization & Personalization

We produce styles incorporating dinosaur bone inlays in the center, off-center, or side of the ring in either contemporary or precious metals. Inlays start at 1mm and can be as wide as 7mm. Choose from any one of our popular styles or design your own dinosaur bone ring with our ring builder.

Wear & Care

We seal dinosaur bone inlays with a layer of resin to protect it from wear and water, however, these rings should be treated as fine jewelry, and should be removed during harsh activities that could damage the ring.

Cleaning: Dinosaur bone rings need no special care. These rings can be cleaned with regular jewelry cleaner, steam or ultrasonic (refurbishment).


Q: Is dinosaur bone legal to use in jewelry?

A: In the United States, fossils are legal to own and distribute. A dedicated policy of ethics is followed to source dinosaur bone. No material is collected from state or federal lands and no specimens are damaged in order to extract the gemstone inside.

There are many options for customizing your ring. Add an engraving, inlay or sleeve to make your ring, truly yours.