Amazon.com: Customer reviews: Uranium Ore

Top positive review

Great Sample!

Reviewed in the United States 🇺🇸 on January 9, 2023

My counter is WAY higher than their count. I'm getting 5000cpm through 2 layers of plastic. It's well over 100x the background count in my home.

Top critical review

All critical reviews›

Michael Gatz

Does not calculate micro sieverts. Only cpm

Reviewed in the United States 🇺🇸 on November 4, 2022

Know way to evaluate radiactive decay. Only has defined CPM which is variable upon detector efficiency. No calculation for micro sieverts.

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1,484 total ratings, 1,315 with reviews

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From the United States

Ed willson

Great Sample!

Reviewed in the United States 🇺🇸 on January 9, 2023

Verified Purchase

My counter is WAY higher than their count. I'm getting 5000cpm through 2 layers of plastic. It's well over 100x the background count in my home.

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Steven D. Pryor

Very cool and interesting sample

Reviewed in the United States 🇺🇸 on December 17, 2022

Verified Purchase

This sample is very interesting. It is nice to have to use to check the functionality of Geiger counters. The metal can seems to reduce the radioactivity coming from the sample when the lid is closed. Great value for the money.

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E. Hasert

Uranium in a can, better than sliced ham, everyone needs one, if you have a geiger counter.

Reviewed in the United States 🇺🇸 on November 14, 2022

Verified Purchase

I bought this because I bought a geiger counter and I wanted some thing to test it on. And yep, it's the real thing in the can, register as well on my Geiger counter. Also a great novelty item. This is also a great conversation starter. Just leave it on your desk at work and you'll be surprised how many people come to see you and ask about it. It is totally harmless, just don't rub your hands on it and eat your sandwich for lunch. Wash your hands after handling it. It won't kill you if you didn't, but it's just good common sense.

3 people found this helpful

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Jack Joulak

Awesome chemistry

Reviewed in the United States 🇺🇸 on November 17, 2022

Verified Purchase

Very cool. Uranium is an awesome element. I did a cool excitement with it when I put it in water and tried to see if any bubbles were formed from radon gas.

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Michael Gatz

Does not calculate micro sieverts. Only cpm

Reviewed in the United States 🇺🇸 on November 4, 2022

Verified Purchase

Know way to evaluate radiactive decay. Only has defined CPM which is variable upon detector efficiency. No calculation for micro sieverts.

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Jason

Exactly as expected.

Reviewed in the United States 🇺🇸 on August 26, 2022

Verified Purchase

Comes in at a spicy 4000+ cpm depending on orientation of Geiger counter against the specimen. Also trace fluorescence under UV light at 365nm.

4 people found this helpful

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Joe S.

2 out of 3 were very small, all are very weak, 500cpm-600cpm only.

Reviewed in the United States 🇺🇸 on August 10, 2022

Verified Purchase

I ordered 3 samples, 2 of them were very small, all 3 are very weak, 500cpm-600cpm only.
Very disappointed in these, I suggest you buy elsewhere.
Also, no one else tells you, so let me say it here.
These are “NOT” returnable!

3 people found this helpful

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ce54r

The best useless product I've ever purchased.

Reviewed in the United States 🇺🇸 on June 1, 2013

Verified Purchase

So after a few weeks I finally had the balls to open the container and see what's inside. The item came in white cardboard container which displays the radioactivity symbol and the warnings about the product, and it's probably the best part because of its semi-menacing look. Inside that container was a smaller metal container which was very well protected in bubble wrap and foamy things. This metal container has no labels of any kind. Inside the metal container is the uranium inside a plastic bag surrounded by more foamy things. The uranium looks just like any other little rock, and when I say little, I mean little. It was disappointing it didn't glow like kryptonite, because I don't have a Geiger counter to check it and see if it's really radioactive, so this could be just a little rock and not uranium.

So, I paid $7 for the right to say I ordered uranium on the internet, I guess, not bad, better than $40.

One thing, on the white container the warning says that the "specimen emits alpha, beta and gamma rays", I'm not sure about the beta or gamma, but I definitely feel the alpha rays because immediately after opening the container I got this impulse to drink beer and watch sports.

331 people found this helpful

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Tennessee Phil

Since uranium for geiger counter testing

Reviewed in the United States 🇺🇸 on September 12, 2019

Verified Purchase

This is a nice, very active uranium sample that's useful for testing geiger counters. It came in a metal container with a certification document from "Images SI Inc." stating that they tested the sample and measured 1,682 CPM using their GCA-07W geiger counter.

To avoid contamination, I left the sample in its plastic bag while I tested it with my S.E International Ranger Alert and my GQ GMC-600Plus. Both the Ranger and the GMC-600+ have open windows with pancake detectors. Here are my results:

Ranger readings:
Direct contact with the plastic bag = 9,400 CPM
Separated by a piece of paper = 6,400 CPM
With plastic cap covering detector hole = 1,650

GQ GMC-600+
Direct contact with the plastic bag = 6,700

The Ranger has a fine grid over the detector opening. The GMC-600+ has a plastic mesh covering a screen. So the sample was about 5 mm further from the GM tube and partially covered by the plastic grid.

My conclusion is that both the GMC-600+ and the Ranger are much more sensitive than the GCA-07W. The Ranger is the most sensitive probably due to the fine mesh protector and the proximity of the grid to the GM tube.

Btw, Amazon provided a star rating for "flavor" for this product. I didn't evaluate that.

95 people found this helpful

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Christophe

A surprisingly hot little source.

Reviewed in the United States 🇺🇸 on April 23, 2021

Verified Purchase

I am a "Radiation Worker" in the U.S. so I have experience working with radioactive sources. I bought a geiger counter for personal use (GQ GMC-600+) and I wanted to get an idea of its function. I ordered the Uranium sample, which did take a bit longer to arrive than I anticipated, but it was worth the wait.

As you can see from the picture I attached, with direct contact to the Uranium sample my GC indicated a high of 6.874 Milli-Roentgens/hour of Gamma decay, and 24,060 Counts Per Minute of Alpha decay! The label on the can and bag the sample comes in says 2697 CPM when it was tested, so the technician must have found the weakest part of the sample when testing. This sample is stronger than I expected, but is still perfectly safe.

5 people found this helpful

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4 star		13%
3 star		6%
2 star		1%
1 star		8%

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Uranium Ore

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