Inclusions Flashcards
To identify inclusions in finished diamonds
What is a bruise
A tiny area of impact accompanied by very small root-like feathers typically occurs at a facet junction
Cavity
An angular opening created when part of a feather breaks away
Chip
A shallow opening that occurs at the girdle edge, facet, junction or cutlet caused by damage to the stones surface
Cleavage
A break in a diamond
Crystal
A type of inclusion. A crystal is a mineral deposit trapped inside the diamond
Cloud
A group of tiny, white inclusions which give a cloudy appearance.
Feather
A fracture in a diamond that looks like a white feather.
Grain Center A small, concentrated area of crystal distortion; can be white or dark and might have a thread-like or pinpoint-like appearance.
Indented Natural
A portion of the rough diamond’s original surface that dips below a polished diamond’s surface.
Internal Graining
Lines, angles, or curves that might appear whitish, colored, or reflective, or affect transparency at 10X; caused by irregularities in crystal growth.
Knot
A white or transparent diamond crystal that extends to the surface after fashioning.
Laser Drill-Hole
Laser drilling within a diamond that creates a surface-reaching feather or expands a pre-existing feather around a dark inclusion so that it reaches the surface. The feather then provides access for bleaching to decrease the visibility of the inclusion.
Needle
A thin, elongated crystal that looks like a tiny rod at 10X.
Pinpoint
Very small inclusions in a diamond.
Twinning Wisp
A series of pinpoints, clouds, or crystals that forms in a diamond’s growth place; associated with crystal distortion and twinning planes.
