REAL TURRKIS is RARE and unfortunately there are no cheap stones in good quality.
Most of the jewelry on the market, such as necklaces, bracelets, etc., are now only the COLOR "TURKIS" - but not the gemstone: TURKIS.
As a rule, you can assume that beautiful "turquoise" at a relatively low price is NOT REAL TURQUOISE, but one of the countless imitation variants and therefore FASHIONABLE JEWELLRY
. If in doubt, ask the seller for a certificate of authenticity.