a colorless variety of opal, sometimes transparent like glass, and sometimes whitish and translucent.
Origin of hyalite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hyalite
Historical Examples of hyalite
a clear and colourless variety of opal in globular form
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012