I promise to answer each and every geology question to the best of my ability. It's climbing around in caves, exploring the mysteries of those big caverns under the earth. For an explanation of caving terms, visit the Caver's Glossary . Stalactites cling tight to the ceiling of caves.
Stalagmites grow from the floor of the cave.
Stalagtites and stalagmites are formed over a period of years, usually hundreds of years, usually by the mineral Calcite, by water dripping from the ceiling of the cave. The stalactites and stalagmites are formed by years and years and years and years of grains of sand built up on each other. But I suspect what you're looking for is the Crystal system. Triclinic' is a mineral with three axes all of unequal length without any at right angles. There's also a really fun game, Pick a Pair o' Crystals , at the 'Dynamic Earth' site.