Gemstones have always been used in jewelry for thousands of years, and have evolved as art, fashion, and style has changed.  From Hollywoods Golden Age, to Art Deco and Art Nouveau, the use of gemstones in jewelry changes with times. Gemstones also communicate and express differently. Diamonds and pearls are go to classics, while Opals are more contemporary and more commercially used. Aquamarine has become more popular recently, and gives a 'Royal' effect due to (Former) Duchess of Sussex, Meghan Markle. Color may be the most important factor when it comes to jewelry, as the color is what is the selling factor. When jewelry designers pick out opals, they will use ones with pink hues because the 'Millennial Pink' trend in fashion.