big rock with huge nuggets of something....
- Thread starter patraney
- Start date
gunsil
Silver Member
- Joined
- Dec 27, 2012
- Messages
- 3,863
- Reaction score
- 6,208
- Golden Thread
- 0
- Location
- lower hudson valley, N.Y.
- Detector(s) used
- safari, ATPro, infinium, old Garrett BFO, Excal, Nox 800
- Primary Interest:
- All Treasure Hunting
Looks like iron pyrite, also known as "fools gold". Pyrite is known for it's cubic form.
against the wind
Platinum Member
- Joined
- Jul 27, 2015
- Messages
- 24,797
- Reaction score
- 24,982
- Golden Thread
- 0
- Location
- Port Allegheny, Pennsylvania
- 🏆 Honorable Mentions:
- 1
- Detector(s) used
- E-trac, Excalibur, XP Deus, & CTX 3030.
- Primary Interest:
- All Treasure Hunting
I had a rock once
ecmjamsit
Hero Member
Check it with a metal detector! If it beeps then it deserves more scrutiny. Looks like pyrite though.
civil_war22
Relic Recovery Specialist
- Joined
- Dec 5, 2008
- Messages
- 3,215
- Reaction score
- 2,814
- Golden Thread
- 1
- Location
- NW Arkansas
- 🥇 Banner finds
- 1
- 🏆 Honorable Mentions:
- 1
- Detector(s) used
- Fisher F75 SE/LTD2, minelab Etrac, whites classic id, spectrum xlt, fisher f7, fisher 1266, king of all Tesoro Cibola, Tesoro Vaquero, Fisher 1280-X, minelab equinox, Fisher F75+ Garrett AT MAX
- Primary Interest:
- Relic Hunting
Iron pyrite and quartz
nmth
Sr. Member
If it beeps...
Hi, Looks like one of the Pyrites, there are a few to choose from. Maybe mindat.org and the "Minerals by Properties" type of search will help you. Don't forget the streak test. Usually, I look for crystal deformation to indicate the presence of included precious metals, but your crystal faces look "too nice". Usually, sulfides won't beep for me unless they are enriched, even galena. I have 15 lb chunks that are totally silent, and thumbnail size pieces that scream. Assays have shown that about 40-50 oz/ton is the lower limit of detectability in my area. That's how I spot high grade on the dump from 20 paces: look for smoothness (plus slight copper "squeeze"). Anyways, the beeping content may be down in the cracks/scunge, or it could be iron or a magnetic (hot rock type response). You'd have to know your machine's response behavior, but most of mine are crisp on metals and sort of echo-y or lopsided or flat-top staurate on a lot of magnetics. Other more vexing hot rocks are nice and crisp, but on machines that give you a number (phase), they tend to be high, usually 92 to near 100 and easier to filter.
This rock is about 7 inches long and quite heavy...... what you think?
Hi, Looks like one of the Pyrites, there are a few to choose from. Maybe mindat.org and the "Minerals by Properties" type of search will help you. Don't forget the streak test. Usually, I look for crystal deformation to indicate the presence of included precious metals, but your crystal faces look "too nice". Usually, sulfides won't beep for me unless they are enriched, even galena. I have 15 lb chunks that are totally silent, and thumbnail size pieces that scream. Assays have shown that about 40-50 oz/ton is the lower limit of detectability in my area. That's how I spot high grade on the dump from 20 paces: look for smoothness (plus slight copper "squeeze"). Anyways, the beeping content may be down in the cracks/scunge, or it could be iron or a magnetic (hot rock type response). You'd have to know your machine's response behavior, but most of mine are crisp on metals and sort of echo-y or lopsided or flat-top staurate on a lot of magnetics. Other more vexing hot rocks are nice and crisp, but on machines that give you a number (phase), they tend to be high, usually 92 to near 100 and easier to filter.
