This was until the discovery of moissanite in meteor fragments, and the realisation that moissanite could be reproduced in controlled circumstances, leading to the dawn of lab made diamonds. Glow stick necklaces work just like any other glow stick, the result of a chemical mixture. While some glow stick necklaces are made by attaching a short, plastic tube to a string, most are made out of very long, thin tubes that are formed into a loop to be placed over the head.
Explanation of Cut, Color and Clarity of This Diamond
Cut Quality Diamonds of fair cut quality are still quite attractive, but they may not be as brilliant as the top 3 grades. Fair cut diamonds are proportioned to yield more carat weight from the diamond rough. Such diamonds may be attractive to budget-conscious customers.
Color Slight presence of color may be detected in F color graded diamonds by an expert gemologist. The diamonds of this grade are considered colorless. Great choice for the purist. Look for a fluorescence rating of faint, inert, none, or negligible.
Clarity Inclusions and external blemishes in diamonds of SI1 clarity may be easy to spot under 10X power magnification. Location of the inclusions greatly affect their visibility to the naked eye. SI1 diamonds of good color produce as good of a sparkle as the more expansive VS graded stones of lower color. Excellent bargains may be fond in this category.