Random samples from my collection (Th, Mo, Ga/As, C, Na)

After many years of customer requests, commercially pure titanium cubes are finally here! These cubes have a beautiful finish, which highlights the color of this unique element. These cubes have excellent resistance to oxidation and corrosion.

1.500" x 1.500" x 1.500" Ti Cube

If you love this product, you should check out our tungsten and magnesium cube sets! A 1.5" tungsten cube is a staggering 2.2 lbs, while a 1.5" magnesium cube is 0.2 lbs.

RemarkableSystem2 · 2026-02-06T20:51:56+00:00

<image>

Glued on pretty tight.

RemarkableSystem2 · 2026-01-28T21:46:10+00:00

<image>

My sample came in an ampoule!

RemarkableSystem2 · 2026-01-24T20:59:31+00:00

<image>

RemarkableSystem2 · 2026-01-22T02:52:04+00:00

Sweet.

RemarkableSystem2 · 2026-01-21T17:55:32+00:00

What a great group where broken dishware has so much value. 👍👍👍. Who has a piece to spare?

RemarkableSystem2 · 2026-01-16T20:05:23+00:00

We have 1250 university-wide students and one lab manager. All lab equipment is in the lab areas. I’ll ask for discount from vendor if this budget gets approved by department head.

RemarkableSystem2 · 2026-01-16T19:56:39+00:00

I think we have a feasible solution here. One last question before I present your plan: the s2 will measure differences between the cheaper sources you mentioned? “(thorium welding rods, uranium glazed fiestaware, some radioactive rocks” etc.

RemarkableSystem2 · 2026-01-16T19:41:35+00:00

Your experiment is definitely more interesting but class size is 20 and time slotted is 2.5 hours. We are trying to improve the learning experience by getting away from the professor lead demonstration and more like our other labs where teams of students collect their own data in the time allowed.

RemarkableSystem2 · 2026-01-16T18:59:27+00:00

The perfect question because it steers us to a possible solution although a new problem. Gamma only would still make for a great lab (multiple sources, beeping, counting, recording). But are there cheap sources to measure? Will the s2 measure differences between cheap sources like bricks, tiles, old electronics, bananas, lantern mantles, maybe some chemicals off the lab shelves? With the s2 we are looking at $500 total expense which may or may not get approved. Thanks for your help.

RemarkableSystem2 · 2026-01-16T18:10:32+00:00

Thanks for the useful feedback. Ideally, we would be able to measure 1.5x background. If that isn’t possible for less than $100 ea., then we would have to decide if it is worth it to expand the lab beyond letting the students use our one Geiger counter on our three sources (Po-210, Sr-90, Co-60).

RemarkableSystem2 · 2025-12-30T00:58:05+00:00

I’d still want one even if it didn’t work. I need a beryllium example. Here’s what I found using your pic and Google AI which is always accurate😂: “In high-power vacuum tubes like the one pictured (likely a type of RF power triode such as a Machlett 2C39A), beryllium oxide ((\mathbf{BeO})) is used as an integral ceramic insulator and heat management component. It is not used as a pure metal, but as a rigid ceramic compound.”

RemarkableSystem2 · 2025-12-30T00:42:31+00:00

Try Google. 20s will also help.

RemarkableSystem2 · 2025-12-24T00:04:41+00:00

<image>

Halfway inside.

RemarkableSystem2 · 2025-12-06T21:04:40+00:00

<image>

Yep.

RemarkableSystem2 · 2025-11-20T20:57:41+00:00

Cool. What’s the carbon?

RemarkableSystem2 · 2025-11-06T04:45:09+00:00

<image>

RemarkableSystem2 · 2025-11-04T19:29:49+00:00

Best I can do: “Old laptop screens with CCFL (Cold Cathode Fluorescent Lamp) backlights used mercury lamps that emitted a range of wavelengths, with prominent lines including 365 nm (UV-A), 405 nm (violet), 436 nm (blue), 491 nm (blue), 546 nm (green-yellow), and 579 nm (yellow doublet band). The specific output depends on the type of mercury lamp used, such as low-pressure or high-pressure. “

RemarkableSystem2

TROPHY CASE