Spinel is a gemstone mineral that has been confused with ruby and sapphire for over 1000 years. Several of the most spectacular spinels ever discovered have been mounted in “crown jewels” and other “jewelry of significance” under the assumption that they were rubies or sapphires. Spinels range from strong, deep colors to very light pastels, coming in all shades of pink, lavender, red, red-orange, purple, blue, and even black. (Only pure green and yellow appear to be absent). These gems are found on every continent. The varieties are usually referred to by their color. The red and blue varieties are perhaps the most celebrated since they were historically identified as rubies and sapphires.