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Agate - Altered

*Experimental Coin* Agate from Brazil with black and white banding at center, surrounded by beige/brown bands on the exterior. The natural color of this material is a lighter, more translucent and pale beige and it was dyed by the vendor to enrich it with brown tones. I have ground one side down to reveal the natural color of this material while leaving the opposite side dyed. The photos on black show the color difference from one side to the next. The lighter side is more natural color, while the darker side has more saturated browns. Looking at the edge, it's possible to see how the dye impregnated the stone and how it fades into the natural side.

Stone dyeing has been a common occurrence since at least the time of the Ancient Greek culture, so I think it is interesting to document it with a double sided coin in this way. Many agates dyed bright desirable colors (bright greens, purples, blues, pinks, etc) are sold as natural, which I consider to be an unethical practice that preys on uninformed consumers.

This coin is pocket safe and would make a great conversation starter or reference piece.

Catalog #: AGBR002
Material Origin: Brazil
Coin Size: Approx. 32x3mm (1.25x0.11") without case
Opacity: Partially or fully translucent
Durability: Pocket safe outside of case
Size Guide

All Lithicoins ship with a free protective case!

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Lithicoin Attributes

Catalog #: 

The catalog number is unique to each individual Lithicoin, and allows your coin to be accessed at any time by typing this number into the search field on our site.

Material Origin:

This is the location where a Lithicoin's material is sourced. We are as specific as possible in the main coin description when we know more about origin (sometimes we will know a specific mine location), but we try to at least note the country. Sometimes we may not know the origin of a particular piece of material, and these coins are marked as "Unknown."

Coin Size:

Standard size for Lithicoin stone specimens is approximately 32mm x 3mm (1.25"x0.11" or 1 3/4" x 1/8"). Size can vary by about .5mm (one half millimeter) due to being hand carved from a natural material.


Opacity refers to the translucency of a coin material when backlit. Materials that do not allow light to pass through are considered "Opaque." If light passes through a part or all of a Lithicoin, it is considered "Partially or fully translucent."


Our durability ratings are designed to help you understand how a Lithicoin should be handled. We use the following ratings as suggestions, but please understand that we can make no guarantees about the actual durability of any natural material.

Pocket Safe: This Lithicoin is suitable for frequent handling or daily carry without the case. Try to minimize the number of additional hard objects carried in your pocket or bag (metal coins, etc.) to minimize the chance of breakage or scratches. Many stones are harder than the metals in our everyday lives, but we prefer a cautious approach.

Handle with care outside of case: This Lithicoin can be removed from the case and handled but should not be pocket carried. Exercise caution to avoid drops, and do not apply pressure or any twisting motions.

Fragile, case recommended: This Lithicoin has physical characteristics such as fragile crystal coverage, internal seams or planes, geode sections, or is a brittle material that can be easily scratched or broken. These coins should not be removed from their cases unless you intend to sit down and carefully enjoy them.

We can't predict every scenario a coin might encounter, and natural materials can be unpredictable. We do not provide any guarantee or warranty in the event of damage.