Many-Coloured Gem Often Used in Place of Diamonds
Puzzle 19 of Spicy Things Easy Pack
Question is: Many-Coloured Gem Often Used in Place of Diamonds
and the answer is: ZIRCON
Word Meaning:
ZIRCON — (uncountable) A mineral occurring in tetragonal crystals, usually of a brown or grey colour and consisting of silica and zirconia.
Definitions from Wiktionary.