Here's a basic comparison list I did a while ago.
Tempered Crystal - Better than copper, worse than bronze
Blood Crystal - Better than Wrought Iron & Bronze, but worse than Steel. Makes better Bladed Weapons than Night Crystal, but worse for blunt weapons and armor
Night Crystal - Better than Wrought Iron & Bronze, but worse than Steel. Makes better Blunt Weapons and Armor than Blood Crystal
Void Crystal - Better than Steel, but worse than Orihalcum or Mithril
Bright Silver - Better than Wrought Iron & Bronze, but worse than Steel
Green Copper - Worse than copper, but worth a lot more and a bit lighter (I need to check, it might be better than copper now)
Mithril - Much better than Steel, only worse than Tempestium, Elementium, or Adamantine
Royal Bronze - Better and Lighter than Wrought Iron & Bronze, but worse than Steel.
Orihalcum - Much better than Steel. Only worse than pure Mithril, the Elemental Metals, and Adamantine
Levisium - Somewhat weak, but almost weightless
Verdant Bronze - Slightly weaker than Bronze, but lighter
Shimmersteel - Slightly weaker than Steel, but lighter
Glacium - Stronger than Steel and Void Crystal, but weaker than Mithril. Has a fixed low temperature (about 0 degrees Fahrenheit)
Incendium - Almost as strong as Mithril. Can only make weapons. Has a fixed high temperature.
Ward Iron - Almost as strong as Mithril. Can only make Armor
Tempestium - Only Elementium and Adamantine are better for ammo. Can only be used to make Bolts/Arrows
Elementium - Only Adamantine is superior to this metal
Glacium is indeed sort of a jack-of-all trades metal. It's better than Steel but worse than the rest of the Elemental metals. The Crystal metals are supposed to be made when you don't have access to the materials for Steel. They're really there for races that don't make Steel, not Dwarves. Although dwarves can use them, and Void Crystal is better than steel so it can be worth the effort. Generally, though, Dwarves are probably going to be making Steel and the Elemental metals, or Mithril based metals if they have access to Truesilver.