Chaos Emerald. Chaos Emeralds are magical gemstones containing infinite power. Although they’ve been depicted in a variety of colors and quantities, there are typically seven distinct emeralds: peridot (green), aquamarine (cyan), sapphire (blue), ruby (red), amethyst (purple), topaz (yellow), and diamond (grey).
Reference: archiesonic.fandom.com/wiki/Chaos_Emerald
Is Amber a red color?
Red is one of the primary colors while amber is a mixture already of two colors, a primary (yellow) and the orange. In symbolism they also differ significantly. Amber is more of a serine and glorious color whereas red indicates war and chaos.
Sonic Chaos Emeralds & Power Rings In Real Life!