Aerogel | The Lightest Materials on Earth, NASA-Inspired "Frozen Smoke" (Chunks, High Purity, Silica-Based)

This is amazing. Bought for my husband as he's always wanted it and it's just so cool. Definitely fragile so don't squeeze, etc . Size was decent.

This stuff is neat! The chunk I received is shaped like a rock and roughly silver dollar size. It's super lightweight and you can see through it. I've always wanted to hold this space age stuff in my hand and now I can. If you're into fascinating science, I HIGHLY RECOMMEND this. Great for kids for show and tell at school or for any collector of space related stuff.

Absolutely amazing. I was hesitant on whether the quality would be good. But im very impressed. Just as strange and cool as I hoped it would be. Good range of large and small peices. Good transparency.

Not much to say it’s very cool I like the size of the pieces I like to have stuff just to look at and this is perfect for that it always is so cool to see and hold

Fun to show my friends and colleagues. Super interesting material. Can't believe how light it is. It's like handling hard styrofoam and it crumbles very unpredictably.

After reading the reviews from others, I was nervous that it would arrive in too small of pieces. I was delighted to find that we received several good sized pieces, maybe around a half dollar size. There isn't really a use for these other than the novelty of having been able to interact with the product that my husband and sons have been wanting to touch and hold. They're space fans and they first learned about this product from leaning about it's use on spacecraft. Fun item to give as a gift for any space lovers.

Pieces are a bit smaller than shown in the pic but overall it is what it says it is. My kiddo wanted this so bad and he’s happy with it!

Best stuff ever. Super cool. Worth the buy