The pendant of this necklace was made using PMC (Precious Metal Clay) which when fired in a kiln, burns off the clay leaving only the fine silver.  
Fine silver is of a higher grade than Sterling.  
The freeform design has had an all over pattern impressed on it and I have set four stones, two are amethysts and the other two are a deep blue, but I am unsure of their actual name so I do not want to guess and call them sapphires if they are not!!  It is hung on a medium weight Diamond Cut Belcher chain, which is Sterling Silver.
The clasp is one of my hand made scroll clasps.
The necklace measures 18" (approx 46 cm)
All my jewellery is sent in a presentation box unless otherwise specified.
As the chain and clasp are Sterling Silver I have added one of my logo tags to it which has my personal hallmark.