Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Treasure Hunting
Finds Identification and Valuation
Gold prospect?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="user 4386" data-source="post: 430335" data-attributes="member: 4386"><p>I could give you a definite answer if the photo was in focus <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> My guess is that you are in an area of granite rock, and your soil (or streeam sediment) is loaded with weathered biotite mica flakes which retain their crystal shape, but which change from black to golden during weathering (but not the true colour of gold, not an intense enough colour for most gold). Thin flakes will float - gold flakes that size will not float. If gold you are damned lucky - but I doubt it with the colour and all the crystal shapes and some floating despite their size (gold that floats is like Keens mustard powder, anything larger breaks the surface tension of the water and sinks - the ability to float is a function of density - SG - shape and size)! Pyrite is the least likely, as it weathers to iron oxides (limonite) before it ever weathers out of the rock into the soil, and would certainly not retain its shape in soil - not a single grain would - much less survive long enough to go from soil into streams.</p></blockquote><p></p>
[QUOTE="user 4386, post: 430335, member: 4386"] I could give you a definite answer if the photo was in focus :-) My guess is that you are in an area of granite rock, and your soil (or streeam sediment) is loaded with weathered biotite mica flakes which retain their crystal shape, but which change from black to golden during weathering (but not the true colour of gold, not an intense enough colour for most gold). Thin flakes will float - gold flakes that size will not float. If gold you are damned lucky - but I doubt it with the colour and all the crystal shapes and some floating despite their size (gold that floats is like Keens mustard powder, anything larger breaks the surface tension of the water and sinks - the ability to float is a function of density - SG - shape and size)! Pyrite is the least likely, as it weathers to iron oxides (limonite) before it ever weathers out of the rock into the soil, and would certainly not retain its shape in soil - not a single grain would - much less survive long enough to go from soil into streams. [/QUOTE]
Verification
Post reply
Treasure Hunting
Finds Identification and Valuation
Gold prospect?
Top