This polished fire agate mineral specimen measures 33 x 28 x 3–4 mm and weighs 20.5 carats (4.1 grams). It features a multi-colored bytrodial bubble formation displaying hues of bronze, orange, gold, and green, which are best appreciated under strong lighting. In dimmer light, the stone appears more brownish. The base is uneven, and two minor natural stress fractures are visible upon close inspection (see image of the underside). Given its thin profile and these fractures, this piece is offered as a display specimen rather than a gemstone, with pricing reflecting this status.
The vibrant colors seen in fire agates result from the Schiller effect, similar to that in mother-of-pearl and opals. This phenomenon occurs due to alternating layers of silica and iron oxide that diffract light, producing the interference colors known as fire. To fully appreciate this play of color, strong lighting is essential, as the gems tend to appear darker and more brownish under low-light conditions.
Deer Creek is well known for producing exceptionally vibrant fire agate gemstones, celebrated for their mesmerizing play of color and intricate internal banding. The fire agates from Deer Creek are a treasure trove of beauty for collectors and carvers which prize this locality for its mesmerizing gemstones, high quality rough and exquisite mineral specimens. The fire agate often display brillant vivid flashes of bright red, orange, green, purple, and blue colors. The uncut rough specimens often feature opal formations created during the geologic formation process. Many Deer Creek pieces have a protective chalcedony cap which preserves the vivid fire layers beneath and enhances the carving potential. These natural features make Deer Creek fire agate ideal for lapidary artists who seek material that allows for deep carving and a high contrast polish which reveals the stone’s full spectrum of fiery brilliance.
