Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Spinel" Definition
noun
A hard, variously colored mineral with composition MgAl2O4, having usually octahedral crystals and occurring in igneous and carbonate rocks. The red variety is valued as a gem and is sometimes confused with ruby.
Source: American Heritage Dictionary
Any of a group of minerals that are oxides of magnesium, iron, zinc, manganese, or aluminum.
Source: American Heritage Dictionary
A hard crystalline mineral consisting of an oxide of magnesium and aluminum that varies from colorless to ruby red to black and is used as a gem.
Source: Merriam-Webster
Any of a group of minerals that are essentially oxides of magnesium, ferrous iron, zinc, or manganese.
Source: Merriam-Webster