Are these brown crystals the pyrite crystals?

[Hook111111]

Good morning, I found rocks that have quartz crystals, and inside the rocks are very small square crystals. Are these pyrite crystals and is there a possibility of gold ore in these rocks or not?

 

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[Hook111111]

 

[et1955]

View attachment 1879835
Good morning, I found rocks that have quartz crystals, and inside the rocks are very small square crystals. Are these pyrite crystals and is there a possibility of gold ore in these rocks or not?

I have found a lot of these, pyrite yes, you can polish them up to bring out it's true color.

 

[CGC Miner]

That trigon is cool!

Looks like some cubic crystal either coated, replaced ie. pseudomorph. Or could be oxidized pyrite turned to hematite with gold, ya just never know for sure.