Difference between revisions of "Opalescence"
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| − | [[File:Opalescent salt dish 19781158.jpg|thumb|'''Opalescent salt dish | + | [[File:Opalescent salt dish 19781158.jpg|thumb|'''Opalescent salt dish <br>MFA Acc. #:''' 1978.1156]] |
== Description == | == Description == | ||
Revision as of 08:15, 11 June 2020
Description
An optical phenomena that occurs in gemstone opals and appears as a milky iridescence. Opalexcence is produced natural by the reflection and refraction of light through the spacing and layering of silicon dioxide spheres and water inclusions. An opalescent glaze or glass can be induced by added Boron, fluoride or Arsenic compounds to the starting mixture.