Epidote transitioning to Clinozoisite

Item Description

Here we have a good-sized specimen of this beautiful and distinctive material which simultaneously is representing two members of the Epidote group, in this case, Epidote and Clinozoisite. Chemically, Epidote forms an isomorphic series with Clinozoisite. Epidote represents the iron-rich member on one end, and Clinozoisite is the iron-deficient member on the other end. The beauty of this piece is that no analysis is necessary as it is very clear where the Epidote stops and the Clinozoisite begins. This specimen features several, sharp, lustrous, prismatic, translucent, deep green crystals of Epidote that sharply grade into slightly more translucent, peach/tan color on the terminations, i.e., Clinozoisite, sitting on massive Epidote / Epidotite matrix. This is a great example of how two individual mineral species can sometimes occur in the same crystal as is often the case in many Tourmaline species. Aside from being a scientific marvel, this is actually a very beautiful specimen. The largest crystal measures 2.6 cm long.