Druzy Bar Necklace

Druzy bar necklace. In excellent condition, but there is some tarnishing on the backside of the pendant. Purchased a few years ago at a boutique in Boston. - Not sure what the metal is - Pendant measures approximately 1.25 inches long by 0.25 inches tall (3.18 x 0.635cm) - 16 inch (40.64cm) chain + 3 inch (7.62cm) extender, for a total length of 19 inches (48.26cm) with lobster-clasp closure - Do not wear while swimming or showering - Comes from a smoke-free home - Please ask all your questions prior to purchasing