Turquoise Grading How to Guide. (Part Two) In part 1 We looked in depth at first Color, and secondly the Matrix with are part of (TQI) Turquiose Quality Index. You will need the charts from part 1 to compleat the TQI grading process. These exsaminations and the grading charts of the TQI will help us to grade and value our turquoise. Today Turquiose can be worth a few pennys to $2,000 a carat. Rough turquise can range $1 to $25 per carat or gram ( 1 gram = 5 Carats), for the most common found on the market, of course rarer turquoise were the mines have closed are much more exspensive. US southwest turquiose also comands a premeum for the higher grade and rare turquoise. As we discussed in part one putting a price tag on our turquoise is somewhat subjective, and will change overtime, you never know if someone will find a small pocket of a new variety of turquoise. We will look at several other charts of grading that include, the 1st. structure, structure includes the following ex
