What causes iridescent?

Iridescence, however, occurs when an object's physical structure causes light waves to combine with one another, a phenomenon known as interference. In constructive interference, light waves combine so that the crests and troughs line up to reinforce each other, increasing the vibrancy of the reflected color.

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You can also ask is iridescent a colour?

The definition of iridescent is something that has rainbow like colors. An example of iridescent is the inside of an abalone shell. (not comparable) Producing a display of lustrous, rainbow-like colors; prismatic. Brilliant, lustrous, or colorful. Moreover, is iridescent the same as holographic? duochrome-what's the difference? Holographic is a specific term. A holographic item breaks the spectrum of light and the same fleck of glitter will reflect the whole spectrum of the rainbow. Iridescence is reflective and glittery, but only one color, so it appears to glow.

One may also ask what is your birth stone?

Birthstones. What are the birthstones by month? January is garnet, February is amethyst, March is aquamarine, April is diamond, May is emerald, June is alexandrite, July is ruby, August is peridot, September is sapphire, October is tourmaline, November is topaz, December is blue topaz. What is black opal? Black opal is characterised by a dark body tone which can range from dark grey to jet black. Often a black opal will have a natural layer of potch (colourless opal) left on the back of the stone, which can give the stone an extra darkness and vibrancy of colour.

Also, can quartz be iridescent?

IRIDESCENT QUARTZ. Naturally iridescent quartz has been recognized for more than a century and is known by many names: iris quartz, rainbow quartz, schiller quartz, anandalite, and adularescent quartz.