For a one-carat stone of average-to-good quality you can expect to pay between
$250 and $10,000 per carat.
Spinel may come in many of the same colors as sapphire
and in earlier times many stones that were called sapphire or ruby included both
corundum and spinel. Modern gem testing procedures can easily separate the two
different minerals. Supply and demand has dictated that cornflower blue sapphires
are the most expensive.
Tips to take care of Sapphire Jewelry
Clean with soapy water or commercial solvent and brush. Mechanical cleaners are
safe, except for heavily included gems.