Visitors find sapphires in many colors at the Spokane Bar Sapphire Mine.  The natural Sapphire crystal structure is hexagon with triangle terminations which are often flat.  The most commonly found color is green-blue.  Blue sapphire is the best known color.  Ruby is a red sapphire which is one of the most prized.  Sapphires from 1/2 carat up to 10 carats are fairly common.  The largest known sapphire from the Spokane Bar was 155 carats, found by a man from Idaho.  Other finds, though uncommon, are diamond, topaz, citrine, and ruby.  Garnets of several varieties can be found;  the largest on record weighed 40 carats.  The largest gem quality sapphire was 50 carats (so far).  Order your sapphire gravel concentrate today!  It makes a great gift.