Black crystal?

[mnoel]

Found this rock at the bottom of my pan while panning, There was 2 of them the one in the picture was the larger one. both sides are terminated but have only 2 sides till it gets to a point rather than 4 or more.

 

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[Kray Gelder]

Interesting. Two guesses, tourmaline, but the crystal form throws me. Or olivine. Back light it, see if it's translucent with a greenish hue.

 

[mnoel]

Should i clean it up a little? if so should i just rub it with a wash cloth?

 

[mnoel]

No green that i can see, it’s pretty opaque, has some gold color in spots and a little red in spots

 

[Kray Gelder]

If you found that in a stream, it's a really tough stone to hold it's crystal form. Wash it any way you want. Much better and larger pics would be good. Size and exact shape are a big question mark. It looks octahedron, but elongated, which is a bit weird.

 

[mnoel]

Your description of the size is correct, anyone else have any idea?

 

[Eu_citzen]

Magnetic? Is it possible to test specific gravity?

First thought was Augite, maybe Allanite. But I'm not sure, something looks off.
See if it can scratch a knife.

 

[DDancer]

Depending on how magnetic it is its possible it could be magnetite or a hematite pseudo morph. Both will show up at the bottom of a gold pan and I've seen simular crystals in my own pans though usually quite small. Below is a link you may want to check out. Here is a quote from that link. : May form as a pseudo morph after other minerals, especially as octahedral crystals of Magnetite.
https://www.minerals.net/mineral/hematite.aspx

 

[Indian Steve]

I'm thinking magnetite.

 

[mnoel]

you guys are 100% correct it’s very magnetic. Thank you!