Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
Coin Chat
>
Difference between red and brown copper toning?
>
Reply to Thread
Message:
<p>[QUOTE="desertgem, post: 2927683, member: 15199"]In Visible light spectrum, yes. But only because it absorbs the other wavelengths and reflects the blue wavelength. If it was in a spectrum outside of the visible one, it would not. Trying to explain the scientific reasons why color is what they are can start with the simple, The material absorbs most colors and reflects the ones we actually can see. More complex theory delves into the quanta realm and explains why corundum ( aluminum oxide) can be red ( ruby) or yellow, blue, and various shade and mixes of those ( Sapphires), depending on what ions or color centers ( holes) are present. Color changing minerals on reacting to artificial light or sunlight depending on a energy level to cause a particular change. What color is a bright piece of amethyst in the dark? Same as a piece of crystal clear colorless quartz in the dark <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 2927683, member: 15199"]In Visible light spectrum, yes. But only because it absorbs the other wavelengths and reflects the blue wavelength. If it was in a spectrum outside of the visible one, it would not. Trying to explain the scientific reasons why color is what they are can start with the simple, The material absorbs most colors and reflects the ones we actually can see. More complex theory delves into the quanta realm and explains why corundum ( aluminum oxide) can be red ( ruby) or yellow, blue, and various shade and mixes of those ( Sapphires), depending on what ions or color centers ( holes) are present. Color changing minerals on reacting to artificial light or sunlight depending on a energy level to cause a particular change. What color is a bright piece of amethyst in the dark? Same as a piece of crystal clear colorless quartz in the dark :)[/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
Coin Chat
>
Difference between red and brown copper toning?
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...