lepisphere

lepisphere

[′lep·ə‚sfir]
(petrology)
A microspherical aggregate of platy, blade-shaped crystals of opal-CT.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Due to diagenetic dissolution of opal spicules of sea sponges and their transformation into minute lepispheres of opal CT (which is mixed with clayey-silt, sandy particles with carbonate mud and shells or rests of microorganisms) the rock looks very fine.