Contraluz opal is sometimes the first words a new opal buyer will hear when asking about opals.
It is one of those words like harlequin pattern that everyone in the opal world talks about.
Contraluz is a Spanish word for against the light
Contra Luz in Spanish means “against the light”. This type of opal is famous due to its diffracted play of colors that is unlike other valuable opal. It is a glass like opal in that the light can pass through the stone. ContraLuz is known as the rainbow within the opal when it is backlit. Only a small percentage of opal can show this effect.