What is this inside the rock?

[Whiplash00]

This rock in question is basketball size. 2nd photo is the area in question, what is this pattern? Fossil?

 

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[austin]

Thinking quartz(some rose, some white)

 

[Eu_citzen]

When the quartz formed, it was "hot water", which can change/alter the surrounding rock. Perhaps that's what has happened here.

 

[Tuberale]

Maybe lichen? Lichens are combinations of algae and fungi which grow on rock and tree surfaces.

 

[Whiplash00]

When the quartz formed, it was "hot water", which can change/alter the surrounding rock. Perhaps that's what has happened here.

Can you explain the "hot water" a little more? I'll explain why if I am right about this. Thanks!

 

[Whiplash00]

Ok, looked it up. I'm starting to piece together my property and why I am finding all of this here.

 

[Eu_citzen]

Can you explain the "hot water" a little more? I'll explain why if I am right about this. Thanks!

Quartz veins form by crystallizing from "hydrothermal systems", which basically consists of (naturally) heated water filling up cracks & voids in the country rock.
These waters often transport a lot of elements, besides quartz, like sulfur and a diverse range of metals. The reason is that the heated water has a good ability to dissolve all kinds of stuff. As the temperature drops, the "system" cools down, everything the water transported forms minerals in those former cracks.

 

[Whiplash00]

So that explains this then? Found it with my metal detector a few months ago. It hit this target so loud my speakers rattled, couldn't find it at first because it looked like a rock. 16grams calcium carbonate. I dissolved it in hydrochloric acid and uncovered this.
10 grams silver? Platinum? No idea
I found what I think is scoria and also a septarian nodule. Paired with the Quartz hot water thing, the coral and sea fossils I've been saying are still here. The fact my hilltop appears to be pushed up several hundred feet, Do you think it's a safe assumption to say this was a hydrothermal vent sea floor?