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13-09-2014, 02:10 PM #1
What is this rock I found in my back garden?
Found this in my back garden in North West Leicestershire. I think it might be obsidian, looking at images of rocks online. I'm pretty close to Bradgate Park which has some of the oldest precambrian rocks in England. The area would have seen volcanic activity more than 600 million years ago and would have scattered rocks like this far and wide over Leicester.
This isn't the first time this sort of rock has been found in my garden but this is certainly the biggest found to date. Strangely we've never thought to actually discover what they are before. Although to be honest the last time we found a rock like this was before the internet came into being so we only had books from the library to help out!
It is smooth, black and shiny. It has obviously been subjected to an incredible amount of heat producing an almost glass-like structure with bubbles.
The underside is pretty strange, a grey rough side with bits of brown that could be iron as it is slightly attracted to a magnet.
13-09-2014, 02:33 PM #2
It's an original Xbox controller without the cable(wireless prototype?).
13-09-2014, 02:59 PM #3Immersive Sims on Steam WIP
Thrust Issues: A Marvelous Guide to Fencing in Dark Souls 2
Your name is burning in the language of Xanadu.
13-09-2014, 05:29 PM #4
Well, okay. But I'm not on Reddit which is why I posted here...in the Other Stuff forum...you know, for other stuff not to do with gaming.
13-09-2014, 06:41 PM #5
looks to me like it could be a flint rock. Try to take a knife and strike it against the stone, if sparks fly then you have a piece of flint
13-09-2014, 07:43 PM #6
14-09-2014, 03:05 PM #7
14-09-2014, 03:42 PM #8
Not flint or obsidian, it's slag or more specifically slag glass. It's a by-product of steel making which makes sense as the house I live in was built right on top of where a seventeenth century blacksmith's used to be. Found a horse shoe and hip bone years ago.