This Mala has a very calming, angelic, peaceful feeling. This one is not traditionally knotted but on an elastic durable string. It can also be worn as a bracelet. 
White Banded Agate is seen as a healing stone of calm, good luck and wealth. It tends to have a gentle energy that works on the subtle bodies and energies, they are great for achieving stability and balance in many aspects of one's life. Howlite is predominantly a calming stone. It will aid in sleeping, calming the overactive mind, eases insomnia, dreaming, dream retention and stress relief. Physically, it calms the whole body and releases muscle tension. 
Aquamarine is a stone of courage. Its calming energies reduce stress and quiet the mind. Aquamarine has an affinity with sensitive people. It can invoke tolerance of others and overcomes judgmentalism, giving support to those overwhelmed by responsibility.
Amethyst is known as one of the master Crystals when it comes to spirituality. It is believed to provide powerful protection creating a bubble around the carrier, warding off psychic attacks and negative energy.