CoorsTek Black Uranium Dioxide Evaporating Dish

This authentic CoorsTek Black Uranium Dioxide evaporating dish is a fascinating example of scientific laboratory history. Produced for laboratory use rather than decorative purposes, these specialized porcelain vessels were glazed with a uranium dioxide–based black glaze valued for its exceptional chemical resistance, hardness, and durability under demanding laboratory conditions.

Unlike the bright orange and red uranium glazes found on vintage Fiesta ware, the deep black finish of these laboratory pieces is understated and industrial in appearance. Yet under the right conditions, the glaze reveals its hidden character as a naturally radioactive uranium-containing ceramic, making it highly sought after by collectors of scientific instruments, uranium glass, radioactive minerals, and nuclear history.

Each piece represents a unique intersection of chemistry, materials science, and the history of American laboratory manufacturing. CoorsTek's reputation for producing high-quality technical ceramics has made these uranium-glazed laboratory wares increasingly desirable as surviving examples become more difficult to find.

Whether displayed alongside uranium minerals, vintage radiation instruments, laboratory glassware, or atomic-era memorabilia, a Black Uranium Dioxide evaporating dish serves as an outstanding conversation piece and a tangible reminder of a time when uranium compounds were valued as advanced industrial materials.

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