I'd have to double check later, but if they're what I think, they're special glasses from Open Blocks. You will also note there are 16 colored glasses and 16 colored crayons from Open Blocks. While using a specific colored glasses and the same color crayon, you can "draw" blocks that you can only see/interact with when wearing the glasses of the same color as the crayon.
I believe the Amazing Techincolor Glasses allow you to see all colors of crayon blocks at once.
I should add that while the individual colors of glasses from OpenBlocks let you interact with, as well as see, blocks placed by crayons, the Amazing Technicolor Glasses don't. You can see the blocks, but will walk right through them.
What would yield a stable good mining age?
i'm trying to make one.
this is as far as i have come for now
Extreme hills
Single biome
Flat
Zenith
Zero length
Normal sun
Sky color
Cyan
Normal Weather
Normal Moon
Normal Stars
Villages, Ravines, Caves, mineshafts, Strongholds
is that the correct setup or is it missing something?
You'll want to put the Cyan page before the Sky Color page- that way, your sky will be cyan, rather than something else that takes a color modifier, such as Normal Stars.
You might also want to put the last five pages (Villages, Ravines, etc.) before the Flat page, although I don't know if that makes any difference.
In Mystcraft, modifiers (such as colors, lengths, directions, and biomes) must precede the pages they modify. The way you've set up your book, the Sky Color page will see that it doesn't have any modifiers, so it will choose a color at random. The Cyan page will then fall through to the next page in the book that takes a color modifier, which will probably be Normal Stars. So you'll wind up with some weirdly-colored sky and cyan stars that you'll never see because eternal day.
Last I heard (a while back, but shortly after some major changes, so things might not have changed since), not specifying things does not directly cause instability- but if the random number generator picks some unstable symbol or combination thereof (such as Diamond Ore, Dense Ores, or Single Biome and three different biomes), you'll get instability.
Also, Clear Modifiers no longer picks up all your dangling modifiers (which I don't think you have in the first place), and now also causes instability- so you might be better off without it.
Do note that anything you don't specify will be randomized, you your age might end up with red trees, blue grass, green fog, and orange clouds. These things shouldn't cause any instability at all, however- they just look weird.
