This beauty is one of only two necklaces. The focus stones are Rutilated Black Quartz surrounded with Onyx and Black Spinel.
Rutile is well known for its habit of forming needle-like inclusions within other minerals, especially Quartz, in the form of long and slender yellow straw-like crystals. Less often found are black crystals. These inclusions can range from scattered needles to dense parallel fibers within a host mineral. This combination is known as Rutilated Quartz, and is used both as a collectors mineral and gemstone.