Is Uranium Glass Jewelry Safe to Wear?
I gathered these strange glowing stones in preparation for an upcoming collection, and one question kept resurfacing in my mind: is uranium glass jewelry actually safe to wear?
As someone who wears a large uranium glass bat wing ring nearly every day, I had already encountered countless online assurances that the material was harmless. Still, vague internet consensus wasn't a satisfying answer; before releasing a hundred pieces of uranium glass jewelry into the world, I needed something more definitive.
First a little history:
What Is Uranium Glass?
The practice of adding small amounts of uranium to enhance the color of glass and pottery glaze traces back nearly 2000 years. Archeologists in Italy discovered an ancient Roman mosaic wall from the year 79 AD with greenish-yellow tiles containing the element.
The Czech Republic is the true “birthplace” of uranium glass as we now know it. There are accounts of “pitchblende,” a mineral containing uranium ore, being used in glassblowing in this region as early as the Middle Ages. However, it wasn’t until the 1830s that Franz and Josef Reidel began to regularly implement uranium oxide into their company’s commercial glasswork.

Also known as “canary glass” (and later classified as either “vaseline” or “depression” glass), this vibrant yellow-green material truly took off in the 1880s. Its international popularity lasted through most of the 20th century, as it ubiquitously appeared in kitchen & dining ware, vases, lamps, figurines, marbles, and more. Unfortunately, during WWII, the US had to halt production for nearly 2 decades as the government confiscated all uranium for use in the Manhattan Project.
Albeit less popular now than in its heyday, new uranium glass pieces are still being produced today by companies such as Fenton and Mosser, and in recent years there has been a resurgence of popularity among vintage and oddity enthusiasts. While green is the most common color, you will find shades of yellow, white and blue as well. You can tell that glass contains uranium oxide if it fluoresces bright green under a blacklight.
Is Uranium Glass Jewelry Safe To Wear?
After consulting several experts, including a physicist, geologist, and radiation safety officer, the answer appears to be yes. Still, because scientists prefer measurable evidence over vague reassurance, they encouraged me to test my uranium glass jewelry pieces with professional equipment before drawing any conclusions.
I do own a geiger counter, though it dates back to the 1950s and looks like it has not been switched on since that era. The battery alone feels like a relic.


The inexpensive counters commonly sold online are apparently not very reliable, according to the experts I spoke with, and I was not prepared to invest in highly sensitive scientific equipment myself. Thankfully, Allison, the radiation safety officer I had been corresponding with, invited me to visit the Boston University Environmental Health & Safety lab to test the stones using professional equipment.
She also gave me an in-depth lesson on radiation, and this is what I learned:
What Type of Radiation Does Uranium Glass Emit?
There are several forms of radiation that we encounter constantly in everyday life: alpha, beta, gamma, and x-ray radiation.
Alpha waves are slow and heavy, unable to pass through something as thin as a sheet of paper. Beta waves travel slightly farther, but can still be blocked by lightweight materials such as plastic or thin metal, including the sterling silver used in my jewelry. Gamma rays and x-rays are much more penetrating and require denser materials, like lead, to effectively block them.
We are exposed to low levels of radiation continuously through both natural and manmade sources. Cosmic radiation from the sun and stars is constant, and trace radioactive elements can also be found in granite, brick, soil, electronics, smoke detectors, bananas, lettuce, and even the air and tap water.
In other words, flying in airplanes, living at high altitudes, or simply breathing and existing on Earth already exposes us to small amounts of radiation as part of normal life. Typically about 6mSv per year. This minimal exposure poses no great risk to our health.
Uranium glass is primarily an alpha wave emitter. The slow alpha waves will mostly stay contained within the glass itself, and the ones that escape can be stopped in their path by a thin material like fabric, paper, or even skin.
Alpha waves are only potentially dangerous to our body if they are consumed or inhaled, so it is not recommended to breathe in or swallow uranium glass dust.
There are different schools of thought on whether one should use uranium glassware for eating and drinking, but the general consensus is just to avoid chipped items or exposing them to highly acidic liquids like juice or wine. The latter reason actually has less to do with radiation and more to do with the possibility of leaching heavy metals, such as lead, out of the glass.
How We Tested My Uranium Glass Jewelry
At the Boston University Environmental Health & Safety Department lab, we used a Ludlum 320 geiger counter with a Model 44-9 GM pancake probe that detects alpha, beta and gamma radiation. We tested each of my uranium glass cabochons and jewelry pieces individually to see what dosage they emit.
Most of the stones gave negligible counts, not reading above normal background radiation levels. There were a few pieces that registered slightly higher, so we conducted an experiment by placing a piece of paper over them and taking the reading again. With paper blocking the stone, they dropped back down to background levels. This confirmed that the emissions were primarily alpha radiation, which was expected and not considered concerning.


Allison also tested some of my finished uranium glass jewelry pieces in which the stones are bezel-set in sterling silver, and she found there was no significant reading on the silver-facing side of each piece. The metal fully blocked all alpha and beta waves, and no notable gammas were detected.
One additional observation was that the content of uranium oxide used in this glass usually accounts for less than 2% of the object’s total make-up. Considering how small most of these stones are, the overall amount of radioactive material present in each piece is extremely minimal.
She concluded that it is indeed safe to handle and wear the uranium glass stones used in my jewelry.
As I left the lab, Allison offered me one last statistic: the Nuclear Regulatory Commission conducted an extensive study in 2001 and found that the yearly radiation exposure uranium glass collectors receive from their pieces is only about 1% of the total radiation they are exposed to yearly through natural and environmental factors.
Why I Use Uranium Glass In My Jewelry
It was reassuring to finally receive a professional assessment of a material that has fascinated me for years. Uranium glass occupies a strange space between science, history, and design, which is perhaps why I find it so compelling. My jewelry often explores vintage sci-fi & space-age themes with experimental materials such as glow in the dark quartz and antique glass, so the progression of incorporating uranium glass into my work was really quite natural.
The eerie glow, atomic mid-century aesthetic, and subtle sense of danger have made it one of my favorite materials to work with.
And thankfully, I now know it can be appreciated and worn safely.
Happy collecting and wearing!
Uranium glass and sterling silver "Meteor" ring
Uranium Glass Jewelry FAQ
Does uranium glass jewelry glow in the dark?
Uranium glass glows bright green only in the presence of UV or blacklight exposure. It is fluorescent, not phosphorescent, so it does not retain the glow when removed from UV light.
Is uranium glass jewelry radioactive?
Yes, uranium glass is technically radioactive, though typically at extremely low levels. Most uranium glass primarily emits alpha radiation, which is very weak and unable to travel far through materials or skin. According to a 2001 Nuclear Regulatory Commission study, only about 1% of a collector’s yearly radiation exposure comes from handling uranium glass.
What type of radiation does uranium glass emit?
Uranium glass primarily emits alpha radiation. Alpha waves are slow-moving and can be blocked by thin materials such as paper, fabric, skin, or sterling silver settings.
Is uranium glass jewelry safe to wear every day?
Based on expert guidance and radiation testing conducted on my own stones at the Boston University Environmental Health & Safety Department, uranium glass jewelry is generally considered safe for daily wear. The finished sterling silver settings used in my jewelry blocked all significant alpha and beta radiation during testing.
Can uranium glass jewelry go through airport security?
Yes! Uranium glass jewelry contains only trace amounts of uranium oxide and is not considered dangerous or prohibited for travel or everyday wear.
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Minoan Flower Pendant; sterling silver, 14k gold, labradorite and turquoise.

























Conceptual sketch, 1989
My job welding at the bench for a Boston-based jewelry company, 2010
One of my first jewelry shows in 2013 as "Lemantula Designs"

Sterling silver, quartz, onyx, and violet phosphorescence, 2018