Barrett
Ideal_Rock
- Joined
- May 26, 2009
- Messages
- 2,218
Re: Kate Middleton & Liz Hurley move over-now this is a sapp
There is a difference between dark toned and extinct. As Richard Hughes states.."Black extinction is an often misunderstood characteristic of colored stones where black is reflected back instead of color. Wrongly, extinction is ignored, called tone, or called dichroism."
and
"Basically, a gem quality stone is 100% color and has no extinction. As extinction increases, value goes down more rapidly at first and then more slowly as black becomes a large part of the color. Extinction is a nonlinear effect, almost as strongly so as modifier (saturation)."
It has nothing to do with the actual color of Kate's stone color(well it does somewhat, since darker stones it's much more apparent)...it's the gross amount of extinction present.
It lacks brillance, which is a key integral part of gemstones. Why are gemstones faceted in the first place? To be brillant!
There is a difference between dark toned and extinct. As Richard Hughes states.."Black extinction is an often misunderstood characteristic of colored stones where black is reflected back instead of color. Wrongly, extinction is ignored, called tone, or called dichroism."
and
"Basically, a gem quality stone is 100% color and has no extinction. As extinction increases, value goes down more rapidly at first and then more slowly as black becomes a large part of the color. Extinction is a nonlinear effect, almost as strongly so as modifier (saturation)."
It has nothing to do with the actual color of Kate's stone color(well it does somewhat, since darker stones it's much more apparent)...it's the gross amount of extinction present.
It lacks brillance, which is a key integral part of gemstones. Why are gemstones faceted in the first place? To be brillant!