rock found in garden with possable gold in it?

[snowdogg70]

hi my brother in law found this rock in his garden and asked me if i could test it to see if the gold is real , although i dont think it is i tried 18k acid on it and it did nothing anyone know what type of rock this is and if the gold is real or fake? thanks video in link below

 

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[TreasureCatto]

Most definitely pyrite in quartz. Nice specimen

 

[Back-of-the-boat]

That looks like a pyrite cube in matrix, pyrite is what is commonly referred to as fools gold, you can Google it up. It is a very cool specimen to own.

 

[Dougie Webb]

+3 on pyrite. You're not rich, but you do have a neat rock!

 

[blauer]

Pyrite on quartz. Looks like a nice specimen ... picture could be better. Nice.