Amlong Crystal2.5 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 60mm

I had no specific use for a prism other than sheer curiosity after finding the one I had 25-30 years ago as a kid. It was acrylic and a bit dulled up, like what happens to car headlights. This came in the mail promptly. It IS solid glass and is much more solid. I was using a small AA Maglite to try to get a spectrum Dark Side of the Moon style and what I got was... ok. The next day, I held it in the direct sunlight of a window and it gave off a deep, brilliant spectrum. The colors were enhanced beautifully from the red to the indigo and violet. I held it side by side with my old acrylic one and the glass prism definitely worked much nicer. I imagine that being glass, it would scratch or break easily, so it does come in a padded storage box with a soft liner. Glad I purchased it. Pretty cool conversation piece. Supposedly, a right angle prism works nicely too and I may jump on one too.

Seems good quality and will separate light into a rainbow when adjusted properly. It's a lot harder to achieve than those decorative teardrop style, where you just hang them and they throw rainbows when the sun hits them, but this style is better for showing how the light is bent.

I noticed many conspiracy theorists for this product... so I'll say: yes this is glass. I tried to scratch it with a very sharp heavy duty knife... it's not plastic!Also, it doesn't just shoot rainbows. You need to have a valid setup... so no, you can't use the sun on a cloudy day (diffuse light) or in a room with more than 1 light source.With a very bright flashlight it's very easy... just rotate the prism until you see the spectrum. The photo I included is a high CRI light source, so the spectrum was fairly smooth and complete.Mine had a broken corner when it arrived. I'm not going to return it, it's almost not noticeable at all.

i was impressed that for a very resonable price this glass prism arrived in pristine condition in its own presentation satin padded box - wow! . . . now if only I can be careful not to drop it!

Great gift for kids - unfortunately it broke fast and quite easily, so maybe not.