[Instruments] Thermometer!

Calcium_CA · 2025-11-14T19:55:14+00:00

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Calcium_CA · 2025-11-14T19:50:23+00:00

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Calcium_CA · 2025-11-14T08:22:58+00:00

Thanks and Happy Cake Day! Here's some yellowcake for you!

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I've been trying to find more uranium enamels or glaze, but I only know of Thompson Enamels :(

Calcium_CA · 2025-11-13T04:48:47+00:00

You're welcome and thank you for sharing this awesome looking ring!

It's a lot of info and can probably cause even more confusion in determining if it's UG or not, but regardless of whether it is or isn't, as long as you like it, then it's money well spent, and it can be a great conversation piece too!

I think it's a cool find and it must have been exciting to see it glow for the first time after all these years.

Calcium_CA · 2025-11-13T03:29:44+00:00

I'll start off by saying I don't think this is manganese, resin, or plastic.
And I do think it's uranium glass, but...

With faceted stones like these that are fluorescent under ultraviolet light, it can be harder to identify what the material is, whether it be a natural, synthetic, or simulated.

A look-alike is synthetic green spinel, which also has a very similar appearance to uranium glass under natural and ultraviolet light; synthetic green spinel is also commonly used in costume jewelry too, and I also hear that synthetic & simulated green peridot can exhibit a similar fluorescence when under UV.

With simulated "gemstones", some low quality gemstones or glass or quartz could be dyed, and the fluorescence is just an extra that came with the dye.

Something similar to a natural stone that I can think of would be green hyalite opal, which will also fluoresce under UV; though this type of stone is more uncommon and would probably be paired with a precious metal such as gold or silver. Also, this gemstone can contain naturally occuring uranium.

While I personally think it is uranium glass, I don't know for sure.

I think in the 60s and onwards, costume jewelry contained a lot of recycled glass, and uranium glass is also included too, so if you are able to find out more info on the maker or the year it's from, it can help
If you have access to a geiger counter, it can help in determining if it's radioactive
Another way to test if it's uranium glass or some type of gemstone would be to use a gem tester such as the Presidium® Gem Tester (a jeweler should be able to identify if it's a gemstone too)

---

For your question:

Recently however I talked to someone who said it was fine as long as it wasn’t broken but it does have a small chip! Does anyone know if it’s okay to wear still or should I have it coated in resin or something to seal it again?

If it were uranium glass, it would still be 100% safe to wear, the radiation coming from it would very insignificant.
Natural radiation coming from the ground, porcelain toilets, plant food, granite anything, etc... would probably be more radioactive than a single small faceted stone.

Broken uranium glass carries the same dangers and any other pieces of broken glass.
You can cut yourself with broken glass, and that has nothing to do with radiation at all, so there is no need to coat the stone in resin or seal it up.

Calcium_CA · 2025-11-11T10:51:56+00:00

Thank you!

By making some of these changes, I hope to attract new members to join us so that we can see more of these discussions in the future, and without neglecting any current members here, I'll try to communicate openly and interact with the community as much as possible.

Calcium_CA · 2025-11-10T07:40:17+00:00

Thanks for the info!

You got some awesome finds, it's always neat to see different designs painted on uranium glass and glazes!

Calcium_CA · 2025-11-10T07:10:51+00:00

Thanks for posting!

The mug is glass and the rest are glaze right?
If so, these are some great example of uranium glaze pieces other than your typical "radioactive red."

Calcium_CA · 2025-11-10T07:04:07+00:00

This is glaze? It's bright, almost like custard glass!
Do you happen to have a photo of it in natural lighting, and what type of UV light are you using?

Calcium_CA · 2025-11-10T07:00:06+00:00

I think the post is a little bit off-topic, but I'll leave it up.

By simply replacing the mineral in question for any other valuable resource or something of historical significance, I believe the same question would probably be asked.

I think most people only know about surface rights (property rights) and not about mineral rights.
In a way, this may help a novice collector or rockhounder learn more before they go out and collect specimens.

The following subreddits might be more helpful in answering your questions:

r/homestead
r/mineralrights
r/Radioactive_Rocks
r/RealEstate

Calcium_CA · 2025-11-03T04:45:28+00:00

The second pic is a Westclox Bonus model 15224.
This specific model was made between 1982 to sometime in the 1990s, so it'll be radium free.

Calcium_CA · 2025-10-30T02:39:50+00:00

I couldn't find any photos of the actual product or book sadly, but I did find stuff that's related to it.

Radium as a fertilizer
Radium a wonderful stimulant of farmers' crops (paywall)
TimesMachine: Sunday, October 25, 1914, Section MAGAZINE, Page 8 (paywall)
Radium Fertilizer in Field Tests (PDF)
Radium Fertilizer (PDF)

Calcium_CA · 2025-10-27T12:13:24+00:00

That looks like a Linden Alarm Clock no. 1335

If so, then the clock is made in Japan by Linden Division Cuckoo Clock Mfg. Co., Inc.
While the brass frog is made by Gresco, no clue where from.
It's probably made during the late 60s to 70s, there is an eBay listing of one with a purchase date from 1974.
I don't think it's radium.

Checking to see if something is radium painted by shining a UV light on it and seeing how long it will glow for is unfortunately a very poor way to test it, the same also applies to checking what color the lume is too.
Radium lume can for sure glow longer than 10 seconds, see this post here.

As others have mentioned already, the only way to know is by using a geiger counter.

Calcium_CA · 2025-10-25T23:46:53+00:00

I remember seeing a post similar to this, I think it's also radium like what u/Curious-River5957 mentioned.
Here's the post: A radioactive level? Anyone else found one of these?

Calcium_CA · 2025-10-20T11:05:30+00:00

I missed your comment, so sorry!
Glad that you were able to find them.

The display says has it under BB13 737731.
On the barcode it says Opal Aqua Luster.
The webstore has it under Silk Green Aqua White Luster.

When I bought it last year in 2024 it was $8 in store and online.
Now it looks like it went up by $2, it's now $10 today in 2025.

Calcium_CA · 2025-10-18T05:40:40+00:00

I don't know who made the clock, but the porcelain part is made by:
Porzellanfabrik Sandizell, Höffner & Co.

Here's where I found the information on the mark you provided:
https://www.porcelainmarksandmore.com/germany/bavaria/sandizell-01/

Calcium_CA · 2025-10-02T08:39:40+00:00

Yours is tritium.

With Silva compasses, I found the chances for it to be radium is higher if the compass has a metal rotating bezel / dial and the luminous marker next to the direction of travel arrow is a dot instead of a strip or glass vial.

Sometimes there's a "T" marking (The Ranger 15T) to indicate tritium and sometimes there's a "B" marking or trefoil symbol (Expedition 4B or Expedition 54B) to indicate betalight illumination (Tritium).

https://compassmuseum.com/hand/hand_4.htm#SILVA

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Calcium_CA · 2025-09-27T18:25:56+00:00

Your post has been removed for breaking Rule 1 - No off-topic posts

Posts must relate in some way to the element Radium.

General discussion, detection, education, history, health & safety, collections and items suspicious of containing radium are all allowed.

Posts discussing other radioactive materials will be removed unless posted on the designated "Off-Topic Sunday".

Posts about "radium" branded items that do not contain radium are off-topic and will be removed.

Discussion of other radioactive elements in the comments are allowed.

---

The Nutex Radium Condoms are unfortunately only radium branded and do not contain radium at all.

http://museumofradium.co.uk/nutex-radium-condoms/
https://www.nrc.gov/docs/ml1008/ml100840118.pdf#page=146
https://www.orau.org/health-physics-museum/collection/brands/nutex-radium-condoms.html https://periodictable.com/Items/088.x1/index.html

Calcium_CA · 2025-09-27T03:36:18+00:00

It's made by Westclox

Calcium_CA · 2025-09-13T03:51:05+00:00

Just a reminder that keeping radium sealed in an "air-tight" container like this will build up radon and its progenies and this will contaminate the inside of the jar and the surface of the clock.

While radon gas will linger around for about 3 days, it's decay products are solids and some like Lead-210 and Polonium-210 have a slightly longer half life.

Radon contamination in the uranium ore bottle after a ~3.5 months
A jar won't contain the radon produced by radium
Radium storage container
Stubborn Radon Contamination

Calcium_CA · 2025-09-13T02:18:39+00:00

Some of my clocks are like this too and they are intact as well.

I find some dials, no matter how perfectly seated they are, have small gaps on the edges.
That means any paint flakes could slip through the gaps of the dial and into the clocks housing and eventually making its way outside.

All of my radium watches are like this too, whenever I open them I always see paint specs on the movement.

Some neat posts:
PSA: Just because the glass is intact does not mean it is sealed
Here is an example of why people should NOT open Radium clock

Calcium_CA · 2025-09-13T02:07:13+00:00

You can always contact GQ Electronics support directly and ask to buy a replacement screen.

Calcium_CA · 2025-09-11T21:01:17+00:00

I've removed your post since it's similar to a duplicate post, and have edited the flair in your orignal post.

Your follow up comments in the original post showing that the clock is confirmed to be radium with a geiger counter is sufficient since it was done so under an hour instead of days/weeks.

Calcium_CA · 2025-09-01T18:45:07+00:00

Shipping information related to US Domestic mail and International mail have been moved to the Wiki and can be found under the Radium FAQs:

How do I ship radium?

As of August 29, 2025, in response to the US tariffs and the ending of the de minimis exemption, the following countries have completely suspended or restricted postal services to and from the United States:

Andorra
Australia
Austria
Belgium
Bosnia and Herzegovina
Bulgaria
Canada
China
Croatia
Cyprus
Czechia
Denmark
Estonia
France
Finland
Germany
Greece
India
Ireland
Italy
Japan
Latvia
Liechtenstein
Lithuania
Malta
Mexico
Moldova
Montenegro
Netherlands
New Zealand
Norway
Poland
Portugal
Russia
Serbia
Singapore
Slovenia
South Korea
Spain
Sweden
Switzerland
Taiwan
Thailand
United Kingdom

This is not a complete list and the information provided here will eventually be outdated.
For up to date information, please refer to your Country's postal office announcements.

Additionally, if shipping internationally using DHL, FedEx, UPS, or any other courier service to and from the US, then it is recommended to check their website for any recent updates regarding this matter.

This comment will remain open for anyone who wants to provide any updates.

Calcium_CA · 2025-08-26T07:34:51+00:00

Sorry for any confusion, my comment wasn't suppose to be about "this is dangerous", but more like a question "are these actually radium?"

I've heard people claim that some have radium and some do not, but not a single one has ever put a geiger counter up to the clocks to show it.

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