This is silver pendant made from flashy lime green Vesuvianite (Idocrase). This prismatic sparkling crystal come from World famous Jeffrey Mine in Canada.
The Jeffrey Mine is a household name among mineral collectors all over the world, famed for its beautiful specimens of Vesuvianite, Grossular Garnet, Pectolite and Prehnite. The fine coloration of the Vesuvianite specimens from Jeffrey Mine stands them out above many other locations. The mine closed in 2010 (the general consensus as there are conflicting reports), and both the open pit and the lower underground levels are known to be flooded. There has been talk about the mine reopening for Asbestos, however it is looking unlikely due to current political considerations.
Location: Jeffrey Mine, Asbestos, Canada
Size: 2.1 x 1.1 x 1.0 Centimeters with bail
Weight: 2.93 Grams Combined

Interesting Fact:
Vesuvianite (Idocrase) - Named after the place it was originally discovered, Monte Somma, Vesuvius, Italy. Vesuvianite is also alternatively called Idocrase, a name derived from the Greek word krasis meaning "mixture" which is an allusion to the fact that its crystals show a mixture of other mineral types.