It is not as colorful!!! Oh Overcast skies!!!
This is an amethyst crystal, amethyst color... I hope at least the camera can show its true nature.
Set in sold sterling in a rustic style, the pendant itself hangs in cascade from an open agate druzy heart stone with a secondary top link in sold sterling. 
Great to wear as is in a chain -soon to come, some chains..., yay!!!- or as an addition to a beaded, leather, textiles, etc. It measures Total 102mm x 35.5mm approx.
(The colors in the pictures seem more vibrant.)