1 - w/ Silver Leaf, 2 - w/ Silver Leaf (reduced & encased), 3 - Over Silver Foil, 4 - w/ Silver Glass Frit (reduced), 5 - w/ TerraNova2 Frit, 6 - Plain (reduced), 7 - Plain, 8 - Over Clear, 9 & 10 - w/ Tuxedo, Copper Green, Opal Yellow, Ivory and Peace
Effetre Sage reminds me of Effetre Dark Grass Green. It's in the same hue group, it's just more saturated and darker. The reactions it has with other colours are a little different though, particularly the way it influences silver glass. On the whole, Dark Grass Green is a better base for the striking colours (the colours pop way brighter on that colour than on this one), while Sage seems like a better base for the reducers (the reduction is more vivid).
Sage is less saturated, lighter and a less on the yellow side than CiM Slytherin, one of my other favourite dark transparent greens.
On top of Sage, silver leaf disperses in a fine, webby dot pattern. When the silver leaf is subsequently reduced and encased it forms a filmy, silvery blanket with a hint of blue in it on top of the Sage. These reactions are pretty much identical to the way silver leaf behaves with Dark Grass Green.
Sage does not influence silver foil. While some greens and yellows turn silver foil a rich coppery colour, all the silver foil does under Sage is reflect back the rich green colour.
Both with reducing and striking silver glass, Sage is a winner. The reducing silver glass frit got beautiful shine and stands out wonderfully on top of the dark green of the Sage. In the bead on the right, I got great colour from my TerraNova2 frit, however the colours are pretty dark and hard to make out on top of the Sage.
There are no interesting reactions to report between Tuxedo and Sage.
On top of Copper Green, the edges of the Sage dots and stringer lines look turquoise. This is because the Sage has cleaned a little of the Copper Green's film at its borders. You can see the inverse of this reaction in the bead on the right, where the Copper Green's pinkish/greyish sheen has been disrupted at the edges of its dots and stringer lines. Generally, Copper Green (when it develops a sheen) develops a greyish film, but when it's used with Sage the film is a pinkish colour instead.
There is no obvious reaction when Sage is used on top of Opal Yellow. When Opal Yellow is on top of Sage, it separates slightly and develops a paler yellow border.
When Sage is used on top of Ivory, you can see an irregular dark line develop around the dots and stringer lines, and a faint browning of the glass underneath. When Ivory is used on top of Sage, the dark line doesn't really present itself but the Ivory spreads and breaks up a little.
There is no real reaction evident between Peace and Sage when Sage is used on top of Peace, but when Peace is used on top of Sage it separates, and goes translucent in between the edges and the middle, so that it looks almost like it is two stringer lines/dots in one.
Here are some fun beads that contain Sage.