Mark Buffa, the Club’s Webmaster of Detroit answers David Chadwick-Brown comments in #481.
I believe that the blue in the black over blue Pagoda ACB is called a homogeneous Light Blue Jade, where the other Light Blue Jade is not a true jade but Celeste Blue over Opal or Flint White over Celeste Blue. It is a triple cased blue. Dick’s two pillar footed vase is in the Celeste Blue Jade color. Erickson misspoke in his book on the color of the green in dispute. It is actually Sea Green and is similar to the Unidentified Blue Gray, but a green version of it. I have only seen it as a stand alone color and not with anything else. The Unidentified Blue Gray is known to come in combination with Topaz.

Mark Buffa responds to Mark Amato’s green piece pictured on the website.
In regards to Mark’s question, what is happening is a micro crazing of the inner layer of glass caused by an improperly annealed piece of glass. This is a similar affect as tempered glass where the inner layer is brittle. This is on a much smaller scale, but a similar affect. This happens when the glass is passed through the lehr at too quick of a pace which could happen during high production rates. All of the colors are susceptible to this. I have a french blue piece with similar crazing. I have also seen it in a topaz to the severity that it was translucent and passed off as a rare color of Steuben.