For over 20 years, Jewelry By Gauthier is one of the leading jewelry-manufacturing firms owned by Scott Gauthier. The firm is one of the leading diamond and gemstone collectors in the world. Based in Scottsdale, Ariz., Scott Gauthier remains one of the gemstone collectors having its unique collection. The unit is stocked with its signature designs along with the trademark. Its products are handcrafted under the brand name GAUTHIER. It uses handcrafting process for the designing and creation of the diamonds.Its collection includes tanzanite, Brazilian kunzite, colored diamonds, natural Alexandrite, pink topaz, rare black and boulder opals, to name a few.