Joined: Wed Jan 14, 2015 3:52 pm Posts: 576 Location: N Dakota
Some kind of bright green stone from Mt St Helen? or synthetic something with a catchy name. If its natural, say a feldspar crystal.. what would be the most likely ingredient for its green color? Iron, chromium, manganese, or some combination? Or would that depend on if it was idiochromatic? is that right? The one thats part of its basic chemical make up and not the one swapping electrons. . . . Im new at this can you tell
Joined: Wed Jan 14, 2015 3:52 pm Posts: 576 Location: N Dakota
Ok it's a synthetic something, even glass maybe. So now we are talking about sharing electrons to get color or can it still be from its basic chemical structure. ?
Joined: Wed Jan 14, 2015 3:52 pm Posts: 576 Location: N Dakota
Then the color is from adding minerals that share the electrons. Charged something , #¥*< have to look it up. Getting old sucks, the memory just doesn't retain things the way it used to.
The raw materials used in commercial glass making contain iron oxide as an impurity, which imparts a yellow/green color to the glass
To offset the yellow/green when making flint (or “colorless”) glass, other colors are introduced by adding selenium (for red) and cobalt (for blue) in proper proportions to yield a gray glass that appears colorless, hence the term “decolorization.”
Green Glass
Green Glass is made by adding non-toxic Chrome Oxide (Cr+3); the higher the concentration, the darker the color. Green glass can be either oxidized, such as Emerald Green or Georgia green, or reduced, as with Dead Leaf green. Reduced green glass offers slight ultraviolet protection.
Joined: Wed Jan 14, 2015 3:52 pm Posts: 576 Location: N Dakota
Ok but glass color is still the process of charged tranfer. Share the electrons which then absorb some light and reflect the rest back which we see as a color. In electronics it would be similar to the super hetrodine process of mixing frequencies and then selecting the exact ones with a bandpass filter. Funny but they use crystals to generate the frequencies in electronics by exciting them with voltage which makes them vibrate at a specific rate depending on the thickness of the crystal. Thick is low freq and slow wavelength, thin is high freq and fast wavelength.
In electronics it would be similar to the super hetrodine process of mixing frequencies and then selecting the exact ones with a bandpass filter. Funny but they use crystals to generate the frequencies in electronics by exciting them with voltage which makes them vibrate at a specific rate depending on the thickness of the crystal. Thick is low freq and slow wavelength, thin is high freq and fast wavelength.
What does that even mean? Rhetorical observation, please don't explain. AND, What does any of this have to do with helenite?
Joined: Wed Jan 14, 2015 3:52 pm Posts: 576 Location: N Dakota
I drift off like that some times. Original question was covered very nicely. 1st I understand its glass. 2nd it's colored by adding minerals during the melting process. 3rd I think that means the color is generated by the charged transfer of electrons sharing with neighboring atoms. Which then absorb some frequencies of white light and reflect others as the color we see in the crystal. I think I got it
There are other coloring mechanisms. For instance, you can get colloidal metallic copper which causes color by (apparently) a similar mechanism to green oregon sunstone.
Joined: Thu Jan 24, 2008 4:01 pm Posts: 1902 Location: Pine City, NY and Dothan, AL
Actually, the superheterodyne and filter analogy is kind of neat (but don't ask me if it's accurate ).
To get back to faceting, this was the reason synthetic quartz was developed. I wrote some of the control software for a Motorola quartz-growing operation. Too many years ago.
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