Crystal Chest

The Crystal Chest is a large chest with 81 extra spaces inside compared to a regular single chest. This gives it a total of 108 storage slots, the same as two double chests and 4 more than an Alchemical Chest.

The Crystal Chest is transparent, and so you can see the items within. This prevents the need for signs labelling the chests.

Building this chest is surprisingly uncostly, as it only requires a Diamond Chest (See Metal Chests) surrounded by glass.

The chest is also compatible with Buildcraft and Redpower.

The Crystal Chest can be collected like any other chest without being broken, despite being comprised mostly of glass. It can be mined with a stone pick or higher, to get back the crystal chest item.

It has a larger storage area than an alchemical chest, but less than the black hole chest (which currently cannot be made in Tekkit, due to bugs)

It is just as durable as a normal chest, so you have limited protection from explosions.

When two are placed adjacent to eachother, they do not join together, and so remain as single chests with 108 storage slots.

Crafting Recipe
They are not just aesthetically pleasing, but are ridiculously good for storing items.