In my opinion, there is a distinction between REAL turquoise and NATURAL turquoise. Stabilized and Enhanced are REAL but have resins or color added. The resins in Stabilized will darken the color and prevent it from changing over time. Composite (or Compressed) is made from small pieces of turquoise bonded together and therefore are considered REAL. Mojave or Copper Turquoise COULD be real (but unlikely) turquoise, most commonly Howlite or Magnesite infused with metals, dyes or chemicals to change the appearance (think green or purple). Block or Reconstituted is arguably NOT REAL since it is a powder infused with resins and color and completely man made (even if the powder is from turquoise). I don’t have the bookmark handy but believe the IACA has legal definitions for the 5 types of recognized turquoise.
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