Pricing and valuation

* Flawless or nearly flawless topaz rough widely available; don't accept a stone that is visibly included.
* Reds, intense pinks or violets are rarest, most expensive (reds $300-$1000/carat; pinks $100-$500/carat in 1-5 carat sizes)
* Imperial topaz of a very intense orangish-red next most expensive ($100-$400/carat in 5 carat sizes; $50-$200 in 1-2 carat sizes)
* Yellow to yellow-brown is common, less than $50/carat
* Blue, particularly deep blue ("London blue"), extremely popular, common; has replaced aqua. as the "inexpensive" blue stone of choice because it costs considerably less. Recent wholesale prices for 3 carat gemstones:
o Sky Blue - $0.75-1.50/carat
o London Blue - $3-4.50/carat
o Super Blue - $3.50-10.00/carat
* Some treated stones (particularly the expensive reds, pinks, violets and deep oranges, but not blue) are known to fade with prolonged exposure to direct sunlight.

Esta es una Valución y Precios de Topacio por la Universidad de Texas en Austin,Jackson School of Geosciences:
Esta es la dirección;http://www.geo.utexas.edu
Al llegar a la página de inicio en la caja de busqueda ponga simplemente;topaz valuation,ahí al final del arículo estas estos precios.