Ruby

 Rubies wholesale to the trade today for approx. $70 for a 1 cwt stone of very low grade quality to approx. $35,000 for  a one carat example of extra fine quality. The price goes up to well over $100,000 or more per cwt. for extra fine larger examples. The retail price can be several times that, depending on the retailers markup.  

Ruby is the birth stone for those born in July. Corundum, with traces of chromium responsible for the color. Rubies are 9 on the moh's scale, right behind diamond ( moh's10)
Sapphires and rubies are the same, other than the color.
Ruby. More expensive that diamond at times. The most expensive ruby to my knowledge is the 25.59 carat Sunrise Ruby which sold at auction in 2015 for $30,420,000.00
Hindus consider ruby very spiritual.... believe the red comes from an eternal flame that no human can extinguish.
Believed to put fire into one's life, and bring economic prosperity.