IACUC GUIDANCE ON PI RECORDKEEPING FOR ANIMAL RESEARCH. INTRODUCTION. This document is provided to assist the animal investigator in determining the appropriate and. necessary record-keeping for animals in research, as mandated by federal and university laws, regulations, and policies.
Meaning Of Opal. Everyone associates opals as one of the worlds most unique gemstone. but what is the meaning of the word Opal. The name Opal is derived from ancient Sanakrit Upala meaning precious stone and later the Greek Derivative Opallios meaning to see a change of colour.
Gemstone hardness contributes greatly to the degree to which a gem will show wear, which is often referred to as wearability. (This is sometimes called âtoughnessâ or âdurabilityâ). An opal with a hardness of 6 will be rapidly covered with fine scratches and lose its polish if worn everyday as a ring stone.