?Diamond? In the rough

[Elliottite]

Hello, I came across this a while back and was wondering if this resembles a rough diamond .

 

[SD51]

Here's a video of a rough diamond found in Arkansas. Welcome to T Net!

 

[jewelerguy]

looks like a piece of tumbler media

 

[Doubter in MD]

looks like a piece of tumbler media

That's a good guess. I didn't find an exact match but it could be. Here's a few examples below.

 

[smokeythecat]

Where did it come from? Does it scratch glass?

 

[unclemac]

not a diamond...no chance

 

[Elliottite]

it does scratch glass it also scratched a piece of corundum i have...

 

[Red-Coat]

Modern tumbling media is made by high temperature firing of ceramics containing crushed silica, and usually has a hardness of at least 7 on the Mohs scale (but can be tailored to lower hardness if required/desired). However, for high tech applications the hardness can be raised further by the inclusion of other (usually man-made) grits. Silicon carbide is frequently used and that has a hardness of about 9.5 (versus corundum at 9.0)