What's new

🔎 UNIDENTIFIED Porphyry Hunt

ToddsPoint

Gold Member
🥇 Charter Member
Joined
Mar 2, 2018
Messages
9,181
Reaction score
33,058
Golden Thread
0
Location
Todds Point, IL
Primary Interest:
Metal Detecting
I spotted a big porphyry rock about a dozen yrs ago along the river. I couldn’t hardly lift it and never bothered to try and get it. After telling a friend about it, he volunteered to help me get it and brought a 2 wheel cart. It was a beautiful day at the river. The river has sorted the rocks by size. Bigger rocks are higher up in the brush. This is all glacial till from Canada.
IMG_8785.webp


I thought I could walk right up to the rock but I couldn’t find it. After walking by it several times I finally spotted it. The river had been up and added a layer of crud to the surface of the rock. When I flipped it over I was sure. I’m guessing it weighed 50 lbs.
IMG_8788.webp
IMG_8789.webp


We hauled it home and put it right on the rock saw. It just barely fit in my 16” saw.
IMG_8790.webp
IMG_8792.webp
IMG_8793.webp

This is rhomb porphyry. Worldwide, it’s fairly rare. I’m just lucky enough to live where the glacier brought some of it down from Canada. This porphyry is about 2 bil yrs old. I’ll carve it into some Indian style pipes and whatever else I decide to make.
 
how much time spent start to finish?
I didn’t keep track but I’m getting faster. There’s a lot to learn to be able to walk like an Egyptian!🤣😜 I learn more with each one I make. It also becomes very obvious which types of rock works better and why.
 
Upvote 3
See, I started reading this post wondering why someone would pack home a large rock from the river. Didn’t look like much raw.

Great work.
 
Upvote 0
Amazing work.

I have a bunch of porphyry. Is it uncommon/worth anything?
 
Upvote 0
Amazing work.

I have a bunch of porphyry. Is it uncommon/worth anything?
Worldwide, it’s very rare. In the few places it occurs I’d say it’s very common. It’s formed in volcanoes so those areas are where it is. In my case, it’s been brought down to central IL by the WI glacier from long gone ancient Canadian volcanoes. I’ve never tried to sell any. I’ve thought about offering up some on eBay as geological samples or for carving stone but never have.
 
Last edited:
Upvote 0

Similar threads

  • Question Question
🔎 UNIDENTIFIED Rocks From the River
Replies
15
Views
1K
Replies
3
Views
476
  • Question Question
🔎 UNIDENTIFIED Found this rock
Replies
2
Views
925

Users who are viewing this thread

Back
Top Bottom