Ruby in Zosite is the natural combination of both ruby and zoisite crystals in a single specimen. Ruby-zoisite was discovered at the Longido mining district in northeast Tanzania by Tom Blevins, an English prospector. To this day, Tanzania remains the only source for ruby-zoisite. Blevins had initially thought that he had found vast ruby deposits in 1949, but it later turned out to be a green zoisite matrix with large inclusions of mostly opaque ruby. Ruby-zoisite is also heavily included with black hornblende minerals.
The necklace has a lobster clasp and is adjustable from17 inches to 19 inches. The main stone is about 1.4 inches by 2 inches.