Naked Science Forum

Non Life Sciences => Geology, Palaeontology & Archaeology => Topic started by: stevephx on 25/08/2010 00:46:06

Title: What kind of rock is this?
Post by: stevephx on 25/08/2010 00:46:06

Hey,

I'm not sure if this is the right place to ask this, but this seems like my best bet.

I found a rock when I was younger in the beach sand in California. I thought it looked cool, it has a black texture and is smooth. Now im wondering it is. If this is the wrong place to ask, sorry.

Here is some information about it

79 Grams Weight
6 1/2 in. Height in max spot
4 in Width in max spot

I do not have a big magnet, but I tried testing it with a smaller magnet and I can feel a slight pull when sliding it over the rock.

Overall it's not even half the size of your hand.

Does anybody have a clue what it is?

(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fimg828.imageshack.us%2Fimg828%2F1743%2Fp1010372e.jpg&hash=1b164e3d5231ab28f4340a15b190af75)
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fimg192.imageshack.us%2Fimg192%2F7180%2Fp1010373e.jpg&hash=4b47191c80bd9fbe18132b2687c52b49)
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fimg713.imageshack.us%2Fimg713%2F4959%2Fp1010374x.jpg&hash=0ec89532f75e017868d96074b25b1c58)

Title: What kind of rock is this?
Post by: frethack on 25/08/2010 01:20:43

The pictures are pretty blurry, but it appears to be obsidian.