Quartz at centre with Blue Lace Agate and brass beads.
Adjustable in size. 
 
Quartz:
Programmability, amplification of one’s intentions, magnification of ambient energies, clearing, cleansing, healing, memory enhancement.
Storm element.
All chakras.
 
One of the most versatile and multidimensional stones with key properties of programmability. This means the stone can be infused with the wearers intentions and such intentions are said to become amplified. 
It is known for a variety of properties, because it can reach into all the different metaphysical elements — assisting with healing, expansion, clearing, cleansing, property etc.
 
It is said to stimulate clarity and clear seeing, assisting the light body. 
 
Blue Lace Agate:
 
Communication, clarity, confidence
Water element
Throat chakra
 
A stone for those that find difficulty in being heard by others. Said to boost the self-confidence in the throat region and clarity of communication too.
Blue lace works in a slow and steady manner and a great energetic support for those that are in fields where communication is important. 
It helps to remind those that words are important parts of how our reality is formed and shaped and assists in creating a clearer one.
 
Calming and centring.