The Cramulet (monkey, ghost, cat, camel) (e) can be dismantled into its separate amulets by a right-click option and can also be re-assembled by using the amulets on one another. It is recommended that players be very careful to avoid losing the Cramulet (monkey, ghost, cat, camel) (e). Although a new one can be assembled, its monkeyspeak amulet component is particularly time-consuming to regain.
The Cramulet (monkey, ghost, cat, camel) (e) and variants cannot be used with a Keepsake key.
It's possible to make multiple cramulets by collecting each amulet individually. Dropping the ghostspeak at the priest in the swamp south of Lumbridge and saying that the amulet was lost will give you a 2nd amulet (or 3rd, and so on). The same goes with the camulet, and the m'speak amulet. The catspeak amulet now works like the others. Dropping all cramulets and cat speak amulets will allow you to obtain a new one from the Sphinx and then pick the old ones up from the ground.
With the release of the Morytania Tasks, of which one of the rewards is to be able to speak to ghosts without needing a Ghostspeak amulet, the Cramulet should have become obsolete as you could now do those tasks and just wear a Monkeyspeak amulet to talk to the Monkey ghost - but a cramulet is oddly enough still needed.