Very heavy Rock possible Hydrothermal activity?

[RockAli]

Any thoughts? Location of discovery is still unknown. Thanks for looking.

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[DDancer]

Chalcedony. Its associated with hydrothermal events. You say its heavy so there might be other minerals involved with the host rock but judging from what I can see of the host rock its possible that its dense pegmatite, volcanic in origin. Nice bit though.

 

[RockAli]

I see veins all over that appear to be gold trapped in the quartz. Could this really be possible?

 

[Eu_citzen]

I agree that its chalcedony, nice piece!