Fossil Spiralite comes from the mid section of India. Natural sparkly Quartz drusy and agate replaced the shell over millions of years ago. Aura coloring was done by vapor deposition of metallic oxides.  Fabricated sterling silver hugs the fossil.  Rondelle mystic moonstones linked by silver plated wire and sterling silver lobster clasp and chain are adjustable to a maximum of 20 inches.