Beautiful Imperial Topaz. Fine color, cutting and clarity. True Imperial Topaz is only mined in one place on earth, Ouro Preto, Brazil, and can be distinguished from common Topaz by its slightly higher refractive index of 1.62-1.63. Natural and untreated. Most gems sold online aren't jewelry grade. They're either poorly cut, have weak color or too many inclusions, giving them the designation collector grade. Collector grade gems aren't worth nearly as much as jewelry grade. This gem is a cut above. We encourage you to do some searches are compare the quality of our gems to others online. The difference should be clear. For Proxibid bidders, shipping is a flat rate of $6, no matter how many lots won. For Live Auctioneers bidders, shipping will be calculated automatically by Live Shipping and all winnings will be combined into a single package for one low rate.